Identify the Focus, directrix, and axis of symmetry of the
parabola modeled by 3x² - 6y = 0

Answers

Answer 1

The axis of symmetry is the y-axis, which is the line x = 0.

The focus of the parabola is at (0, 1/2).

The directrix of the parabola is the line y = -1/2.

The equation in the standard form of a parabola, which is (x - h)² = 4p(y - k).

Given equation: 3x² - 6y = 0

First, we divide both sides of the equation by 6 to simplify it:

x² - 2y = 0

x² = 2y

Comparing this equation with the standard form, we can see that

h = 0, k = 0, and 4p = 2.

From 4p = 2, we can determine the value of p:

p = 2/4

p = 1/2

Now we have the values of h, k, and p.

Axis of Symmetry:

Since the value of h is 0, the equation is centered on the y-axis. Therefore, the axis of symmetry is the y-axis, which is the line x = 0.

Focus:

In this case, the vertex is (h, k) = (0, 0). Since the parabola opens upward (the coefficient of y is negative), the focus will be above the vertex on the axis of symmetry.

So, from the vertex (0, 0), we move upward by a distance of 1/2 unit to locate the focus.

Therefore, the focus of the parabola is at (0, 1/2).

Directrix:

Since the parabola opens upward, the directrix will be below the vertex on the axis of symmetry.

Therefore, the directrix of the parabola is the line y = -1/2.

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Related Questions

A plastic bin contains red, yellow, and green key chains. Out of 350 key chains, 10% are yellow. Of the remaining key chains, 3/5 are green. How many red key chains are inside the bin?

Answers

Your answer is 105 red key chains

please help will give 5 stars image is attached!

Answers

Answer:

I think its 8

Step-by-step explanation:

Given f(x)=2x−7 and g(x)=3x+4, find f(x)×g(x).

Answers

Answer:

f(x) × g(x) is equal to 6x^2 - 13x - 28

Step-by-step explanation:

Given functions:

f(x) = 2x - 7

g(x) = 3x + 4

To find f(x) × g(x), we'll multiply the two functions together.

Step 1: Write down the functions to be multiplied:

f(x) × g(x) = (2x - 7) × (3x + 4)

Step 2: Apply the distributive property to multiply the terms:

f(x) × g(x) = 2x × (3x + 4) - 7 × (3x + 4)

Step 3: Multiply the first term of f(x) with each term in g(x):

2x × 3x = 6x^2

2x × 4 = 8x

The first term of f(x) has been multiplied with each term in g(x), resulting in 6x^2 and 8x, respectively.

Step 4: Multiply the second term of f(x) with each term in g(x):

-7 × 3x = -21x

-7 × 4 = -28

The second term of f(x) has been multiplied with each term in g(x), resulting in -21x and -28, respectively.

Step 5: Combine the like terms obtained from the multiplication:

f(x) × g(x) = 6x^2 + 8x - 21x - 28

The like terms, 8x and -21x, can be combined to get -13x.

Step 6: Simplify the expression:

f(x) × g(x) = 6x^2 - 13x - 28

The final result is 6x^2 - 13x - 28, which is the product of the two functions f(x) and g(x).

Therefore, f(x) × g(x) is equal to 6x^2 - 13x - 28.

Help thank you all always

Answers

All the solution of the expressions are,

⇒ f (4) + g (3)  = 5

⇒ g (5) - f (2) = 3

⇒ f (4) ×  g(5) = 15

⇒ g (3) / f (2) = 3/2

We have to given that,

Two function f and g are shown in graph.

Now, By given graph, we get;

⇒ f (4) = 3

⇒ f (2) = 2

And,

⇒ g (3 ) = 2

⇒ g (5) = 3

Hence, We can simplify all the solutions are,

⇒ f (4) + g (3)

⇒ 3 + 2

⇒ 5

⇒ g (5) - f (2)

⇒ 5 - 2

⇒ 3

⇒ f (4) ×  g(5)

⇒ 3 × 5

⇒ 15

⇒ g (3) / f (2)

⇒ 3 / 2

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IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Out of a randomly selected 1450 people from the population, how many of them would have an IQ between 106 and 125, to the nearest whole number?

Answers

The nearest Whole number, approximately 431 people out of the randomly selected 1450 people would have an IQ between 106 and 125.

The number of people who would have an IQ between 106 and 125, we need to calculate the probability of having an IQ within that range and then multiply it by the total number of people (1450).

First, we need to standardize the IQ scores using the z-score formula:

z = (x - μ) / σ

Where:

x is the IQ score

μ is the mean IQ score

σ is the standard deviation of IQ scores

For an IQ of 106:

z1 = (106 - 100) / 15 = 0.4

For an IQ of 125:

z2 = (125 - 100) / 15 = 1.67

Next, we need to find the probability associated with each z-score using a standard normal distribution table or a calculator.

Using the standard normal distribution table, we find:

P(0 ≤ Z ≤ 0.4) ≈ 0.1554

P(0 ≤ Z ≤ 1.67) ≈ 0.4522

The probability of having an IQ between 106 and 125 is the difference between these two probabilities:

P(0.4 ≤ Z ≤ 1.67) = P(0 ≤ Z ≤ 1.67) - P(0 ≤ Z ≤ 0.4) ≈ 0.4522 - 0.1554 ≈ 0.2968

Finally, we multiply the probability by the total number of people:

Number of people = P(0.4 ≤ Z ≤ 1.67) * 1450 ≈ 0.2968 * 1450 ≈ 431

Therefore, to the nearest whole number, approximately 431 people out of the randomly selected 1450 people would have an IQ between 106 and 125.

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Use the appropriate formula to find the value of the annuity.
Find the interest.
Periodic Deposit is ​$6000 at the end of each year
Rate 5% compounded annually
Time 10 years

a. The value of the annuity is ​$
b. The interest is $

Answers

The value of the annuity is approximately $79,243.59, and the Interest earned is $19,243.59.

The value of the annuity and the interest earned, we can use the formula for the future value of an ordinary annuity.

The formula for the future value of an ordinary annuity is:

V = P * [(1 + r)^n - 1] / r

Where:

V is the value of the annuity

P is the periodic deposit

r is the interest rate per period

n is the number of periods

In this case:

P = $6000 (periodic deposit)

r = 5% (interest rate per period, compounded annually)

n = 10 years (number of periods)

a. To find the value of the annuity:

V = $6000 * [(1 + 0.05)^10 - 1] / 0.05

V ≈ $79,243.59

Therefore, the value of the annuity is approximately $79,243.59.

b. To find the interest earned:

Interest = V - (P * n)

Interest = $79,243.59 - ($6000 * 10)

Interest = $79,243.59 - $60,000

Interest = $19,243.59

Therefore, the interest earned is $19,243.59.

In summary, the value of the annuity is approximately $79,243.59, and the interest earned is $19,243.59.

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On a map, the scale shown is 1 inch : 5 miles. If
a wildlife refuge is 50 square miles, what is the
area of the refuge on the map?
Use the proportion to solve for x.
1 in. 2
25 mi2
x in. ²
50 mi²
Cross
multiplication
can help!
=
The area of the wildlife refuge is [?] square
inches on the map.
Enter

Answers

Answer:

Step-by-step explanation:

6

PLEASE HELPP ASAPPP pleaseeeee

Answers

answer: 28561^2in the area involves multiplying by the 4 sides of the shaded square and the shaded is the colored square.

I.
tory to examination
Tell whether each statement is True or False.
1. If m varies directly as n, then m = kn.
2. If m varies directly as b, then m = kb.
3.
If m varies directly as the square root of n, then m = 1
= k√n.
4.
If m varies jointly as p and 9, then m = kpq.
5.
If p is directly proportional to q, then p = kq².
kn
6.
If m varies directly as n and inversely as p, then m =
Р
kn
p².
7. If m varies jointly as n and the square of p, then m = -
8. If n varies inversely with the cube of p, then n =
k
p³.
9. If m varies directly as n and inversely as the square root of p, then m = kn √p.
10. If m varies directly as n and inversely as the square of p, then m = -
kn
p².

Answers

The statement is:

- True

- True

- False

- False

- False

- False

- False

- True

- True

- True

We have,

True.

If m varies directly as n, it means that there is a constant of proportionality (k) such that m = kn.

True.

If m varies directly as b, it means that there is a constant of proportionality (k) such that m = kb.

False.

If m varies directly as the square root of n, it means that there is a constant of proportionality (k) such that m = k√n, not m = 1 = k√n.

False.

If m varies jointly as p and 9, it means that there is a constant of proportionality (k) such that m = kp, not m = kpq.

False.

If p is directly proportional to q, it means that there is a constant of proportionality (k) such that p = kq, not p = kq².

False.

If m varies directly as n and inversely as p, it means that there are constants of proportionality (k1 and k2) such that m = k1n/p, not m = k/p².

False.

If m varies jointly as n and the square of p, it means that there is a constant of proportionality (k) such that m = knp², not m = -.

True.

If n varies inversely with the cube of p, it means that there is a constant of proportionality (k) such that n = k/p³.

True.

If m varies directly as n and inversely as the square root of p, it means that there are constants of proportionality (k1 and k2) such that m = k1n/√p, which can be simplified to m = kn√p.

True.

If m varies directly as n and inversely as the square of p, it means that there are constants of proportionality (k1 and k2) such that m = k1n/p², which can be simplified to m = kn/p².

Thus,

The statement that is true or false is given above.

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What is the value of x in the equation 4(2x + 12) = 0? (1 point) a −8 b −6 c 6 d 8

Answers

Answer:

-6

Step-by-step explanation:

2×(-6)= -12

4(-12+12)=0

4(0)=0

Human Resource Management System

Answers

A Human Resource Management System (HRMS) is a software solution that enables organizations to effectively manage and streamline their human resource processes and data.

It serves as a centralized system for managing various HR functions, including recruitment, employee onboarding, payroll, benefits administration, performance management, training and development, and employee records. The HRMS automates many manual and time-consuming HR tasks, allowing HR professionals to focus on strategic initiatives and employee engagement.

It provides a range of functionalities that improve efficiency, accuracy, and compliance in HR operations. One of the key features of an HRMS is employee data management. It allows HR departments to maintain comprehensive employee records, including personal information, employment history, performance evaluations, and training records.

This centralized database enables easy access to employee information and facilitates reporting and analytics. Recruitment and onboarding processes are also simplified through an HRMS. It helps streamline job posting, applicant tracking, and candidate evaluation.

Once a candidate is hired, the system automates the onboarding process by managing documentation, employee orientation, and policy acknowledgments. Payroll and benefits administration modules within an HRMS ensure accurate and timely processing of employee compensation, tax deductions, and benefit plans.

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What is the value of x and y

Answers

The value of variables x and y are,

⇒ x = 5

⇒ y = 10

We have to given that,

A right triangle is shown in figure.

Now, By using trigonometry formula we get,

⇒ tan 60° = Opposite / Base

Substitute all the values,

⇒ tan 60° = 5√3 / x

⇒ √3 = 5√3 / x

⇒ x = 5√3 / √3

⇒ x = 5

⇒ sin 60° = Opposite / Hypotenuse

Substitute all the vales, we get;

⇒ sin 60° = 5√3 / y

⇒ √3 / 2 = 5√3 / y

⇒ y = 2 × 5

⇒ y = 10

Thus, The value of variables x and y are,

⇒ x = 5

⇒ y = 10

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Find a1 when Sn=152, r=-3, an=200

Answers

To find the value of a1 in a geometric sequence, we can use the formula:

an = a1 * r^(n-1)

Given that an = 200, r = -3, and Sn = 152, we can utilize the formulas for the sum of a geometric sequence to find the value of a1.

The formula for the sum of a geometric sequence is:

Sn = a1 * (1 - r^n) / (1 - r)

Let's substitute the given values:

152 = a1 * (1 - (-3)^n) / (1 - (-3))

To find the value of n, we can rearrange the formula:

(1 - (-3)^n) / (1 - (-3)) = 152 / a1

Simplifying further:

(1 - (-3)^n) / 4 = 152 / a1

Now, we know that an = 200, and we can substitute these values into the formula for an:

200 = a1 * (-3)^(n-1)

Since we have two equations involving a1 and n, we can solve this system of equations to find the value of a1.

Dividing the second equation by the first equation:

(-3)^(n-1) / 4 = 200 / 152

Simplifying further:

(-3)^(n-1) / 4 = 25 / 19

To solve for n, we can take the logarithm of both sides:

log((-3)^(n-1) / 4) = log(25 / 19)

(n-1) * log(-3) - log(4) = log(25) - log(19)

Now, we can solve for n:

(n-1) * log(-3) = log(25) - log(19) + log(4)

n - 1 = (log(25) - log(19) + log(4)) / log(-3)

n = 1 + (log(25) - log(19) + log(4)) / log(-3)

Using a calculator, we can find the approximate value of n:

n ≈ 2.191

Now that we have the value of n, we can substitute it back into the equation:

(1 - (-3)^n) / 4 = 152 / a1

(1 - (-3)^2.191) / 4 = 152 / a1

Simplifying further:

a1 ≈ 52.717

Therefore, approximately, a1 ≈ 52.717.

[tex][/tex]

Answer:

This expression is read as the sum of 3n as n goes from 1 to 10. Example 1: Find the sum of the first 20 terms of the arithmetic series if a1=5 and a20=62 .

a person who is 5 feet tall is standing 182 feet from the base of a tree, and the tree casts a 196 foot shadow. The person's shadow is 14 feet in length. What is the height of the tree?

Answers

The height of the tree is 70 feet.

To determine the height of the tree, we can use similar triangles and the concept of proportional relationships.

Let's denote the height of the tree as "h". We have the following information:

Height of the person (p) = 5 feet

Distance of the person from the tree (d) = 182 feet

Length of the person's shadow (ps) = 14 feet

Length of the tree's shadow (ts) = 196 feet

We can set up a proportion between the height of the tree and the length of its shadow:

h / ts = p / ps

Substituting the given values, we get:

h / 196 = 5 / 14

To solve for "h", we can cross-multiply and then divide:

h = (5 * 196) / 14

h = 980 / 14

h = 70 feet

Therefore, the height of the tree is 70 feet.

This can be understood by considering the similar triangles formed by the person, the person's shadow, the tree, and the tree's shadow. The ratios of corresponding sides in similar triangles are equal. In this case, the ratio of the height of the tree to the length of its shadow is equal to the ratio of the height of the person to the length of the person's shadow.

By using this proportional relationship and the given measurements, we can calculate the height of the tree to be 70 feet.

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Note: Enter your answer and show all the steps that you use to solve this problem in
the space provided.
4√/6
Simplify by rationalizing the denominator. Show your work.
√30

Answers

Answer:

The radical cannot be simplified, but it can be approximated.

Exact Form:

24

30

Decimal Form:

131.45341380

Step-by-step explanation:

cannot show steps right now

Brett and Andy applied for the same credit card from the same bank. Brett was given a card with an APR of 12.6%. What was his monthly percentage rate? Andy was given a card with an APR of 16.2% what was his monthly percentage rate? if each of them had an average daily balance of $7,980, and had to pay a finance charge, how much more would. Andy pay than Brett?

Answers

Andy would pay $23.94 more in finance charges compared to Brett, given their respective APRs, average daily balances, and monthly percentage rates.

To calculate the monthly percentage rate (MPR) from the given annual percentage rate (APR), we divide the APR by 12.

For Brett:

APR = 12.6%

MPR = 12.6% / 12 = 1.05%

For Andy:

APR = 16.2%

MPR = 16.2% / 12 = 1.35%

Next, we can calculate the finance charge for each individual using the formula: finance charge = average daily balance * MPR.

For Brett:

Finance charge = $7,980 * 1.05% = $83.79

For Andy:

Finance charge = $7,980 * 1.35% = $107.73

To find the difference in the finance charges between Andy and Brett, we subtract Brett's finance charge from Andy's finance charge:

Difference = $107.73 - $83.79 = $23.94

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50 Points! Multiple choice geometry question. Photo attached. Thank you!

Answers

The probability of snow given that the temperature is below 32°F is approximately 33.3%. Hence, the correct answer is (A) 33.3%.

To find the probability of snow given that the temperature is below 32°F, we can use conditional probability. The conditional probability of an event A given event B is denoted as P(A|B) and is calculated as the probability of both events A and B occurring divided by the probability of event B occurring.

In this case, event A represents snow and event B represents the temperature being below 32°F.

We are given the following probabilities:

P(snow) = 50%

P(temperature below 32°F) = 60%

P(snow and temperature below 32°F) = 20%

To find P(snow temperature below 32°F), we can use the formula:

P(snow temperature below 32°F) = P(snow and temperature below 32°F) / P(temperature below 32°F)

Substituting the given probabilities, we have:

P(snow temperature below 32°F) = 0.20 / 0.60

P(snow temperature below 32°F) = 1/3

Converting this fraction to a percentage, we get:

P(snow temperature below 32°F) ≈ 33.3%

Therefore, the probability of snow given that the temperature is below 32°F is approximately 33.3%. Hence, the correct answer is (A) 33.3%.

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2. The table below shows the
number of people in Wurtsboro
and Del Valley that drive two and
four wheel vehicles. Calculate the
percentage of people that own
two wheel vehicles in Wurtsboro.
City
Wurtsboro
Del Valley
Two
wheeled
77
84
four
wheeled
64
57

The options are
27.3%
47.8%
54.6%
57.2%

Please help

Answers

To calculate the percentage of people that own two-wheel vehicles in Wurtsboro, we need to find the ratio of the number of people with two-wheel vehicles in Wurtsboro to the total number of people in Wurtsboro, and then multiply by 100 to express it as a percentage.

In this case, the number of people with two-wheel vehicles in Wurtsboro is given as 77, and the total number of people in Wurtsboro (including both two-wheel and four-wheel vehicle owners) is the sum of the two columns for Wurtsboro, which is 77 + 64 = 141.

Now we can calculate the percentage:

Percentage = (Number of people with two-wheel vehicles in Wurtsboro / Total number of people in Wurtsboro) × 100

Percentage = (77 / 141) × 100

Percentage ≈ 54.6%

Therefore, the percentage of people that own two-wheel vehicles in Wurtsboro is approximately 54.6%.

The correct option is 54.6%.

Evaluate (311)0+3(1514)0

Answers

Answer:

0.

Step-by-step explanation:

we simplify the experssion using the distributive property of multiplication.

311 0 + 3 1514 0 = 0 + 0

Ana spends K8.00 per week. How much will she spend for 21 days?

Answers

Ana will spend K23.94 for 21 days.

To calculate how much Ana will spend for 21 days, we need to determine the cost per day and then multiply it by the total number of days.

Since Ana spends K8.00 per week, we can find the daily cost by dividing the weekly cost by the number of days in a week.

Cost per day = K8.00 / 7 days = K1.14 (rounded to two decimal places)

Now, we can calculate how much Ana will spend for 21 days by multiplying the cost per day by the total number of days.

Total spending = K1.14 * 21 days = K23.94

Therefore, Ana will spend approximately K23.94 for 21 days.

It's important to note that we rounded the cost per day to two decimal places. In real-life scenarios, Ana may have to pay the nearest whole currency amount per day. Therefore, the actual total spending might differ slightly depending on the rounding or any variations in the daily cost.

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Find the measure of the indicated side. Round the answer to the nearest tenth.

Answers

As per the given image, the length of QP is approximately 51.015 yards.

We can make use of trigonometric ratios to determine the length of QP in a triangle RQP.

We must determine the length of QP given that angle QPR is 35 degrees and RP is 73 yards in length.

The tangent ratio helps us understand how the lengths of the sides and angles in a right triangle relate to one another.

The ratio of the lengths of the side across from the angle and the side next to it is known as the tangent of an angle.

tan(35 degrees) = opposite / adjacent

tan(35 degrees) = QP / RP

tan(35 degrees) = QP / 73

QP = 73 * tan(35 degrees)

QP ≈ 73 * 0.70020753821

QP ≈ 51.015 yards

Thus, the answer is 51.015 yards.

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The figure below shows part of a circle, with central angle as marked. What part of
the full circle does the figure represent? Express your answer as a fraction in simple
terms.
150°

Answers

The part of the full circle the figure represent expressed as a fraction in simple terms is 5/12.

How to determine the  part of the full circle does the figure represent?

A fraction represents the parts of a whole or collection of objects e.g. 3/4 shows that out of 4 equal parts, we are referring to 3 parts.

Since a full circle has a total angle of 360° and the given figure has an angle of 150°.

Thus, we can express the part of the full circle represented by the figure as:

150°/ 360°  = 5/12

Therefore, the part of the full circle the figure represent expressed as a fraction in simple terms is 5/12.

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Complete Question

Check attached image

Problem5
On the first day of September, 2019, Gloria planted 5 flowers in her garden. The number of flowers, which she plants at
every day of the month, forms an arithmetic sequence. The number of flowers she is going to plant in the last day of
September is 63.
(a) Find the common difference of the sequence.
(b) Find the total number of flowers Gloria is going to plant during September.

Answers

The common difference of the sequence is d = 2.

The total number of flowers Gloria is going to plant during September is 960.

Let d represent the arithmetic sequence's common difference. Therefore, Gloria plants 5 + 30d = 63 blooms on the last day of September. We obtain d = 2 by solving for d.

The sum of the arithmetic sequence represents the total number of flowers produced by Gloria plants in September. S = (n/2)(a1 + an) is the result of using the formula for the sum of an arithmetic series.

S is the sequence's total, n is its number of terms, a1 is its first term, and an is its last term. In this instance, n = 30 (because September has 30 days), a1 = 5, and a = 63. These variables are substituted, and the result is S = (30/2)(5 + 63) = 960.

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Some questions supply a data set​, like the one​ below, which must be used in order to answer the question.

4
8
9

5
2
7
7
5
8

You can copy the data set into another​ program, such as a spreadsheet or a statistical software​ program

Answers

Copying the data set into another program allows you to leverage the capabilities of that program for Statistical analysis.

The provided data set can be copied into another program, such as a spreadsheet or a statistical software program, to perform various data analysis tasks. Let's explore some common operations that can be performed using the data set.

1. Descriptive Statistics: By copying the data set into a spreadsheet or statistical software, you can calculate various descriptive statistics, such as the mean, median, mode, standard deviation, and range of the data. These statistics provide insights into the central tendency, variability, and distribution of the data.

A

1   4

2   8

3   9

4   5

5   2

6   7

7   7

8   5

9   8

2. Data Visualization: Once the data set is copied, you can create visualizations to better understand the data. This can include bar charts, histograms, line plots, or box plots, depending on the nature of the data and the insights you want to gain.

3. Data Manipulation: Copying the data set into a spreadsheet allows you to manipulate and transform the data as needed. You can perform operations like sorting, filtering, grouping, and calculating new variables based on existing ones. This enables you to extract meaningful information from the data set.

4. Statistical Analysis: If you are using statistical software, you can conduct advanced statistical analyses on the data set. This may involve regression analysis, hypothesis testing, analysis of variance (ANOVA), or clustering techniques, depending on the specific research question or objective.

5. Data Integration: If you have additional data sets or variables related to the given data set, copying it into a program allows you to merge or join different data sets, thereby enriching the analysis and providing a more comprehensive understanding of the data.

Overall, copying the data set into another program empowers you to perform a wide range of data analysis tasks, enabling you to explore, understand, and draw meaningful insights from the data.

In summary, copying the data set into another program allows you to leverage the capabilities of that program for statistical analysis, calculations, and visualizations, enabling you to gain deeper insights and draw meaningful conclusions from the data.

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Setting StartFraction 7 over 3 EndFraction equal to which ratio would result in a valid proportion?

Answers

To determine which ratio is equivalent to the fraction 7/3 and would result in a valid proportion, we need to find a ratio that is equal to the fraction 7/3.

We can set up the proportion as follows:

7/3 = x/y

To find the valid ratio, we need to find the values of x and y that satisfy this equation. One possible valid ratio would be:

x = 14
y = 6

Substituting these values into the equation, we get:

7/3 = 14/6

This is a valid proportion since both sides of the equation are equal.

Therefore, a valid ratio that is equivalent to 7/3 is 14:6.

Miss Lianto mowed 2 7 of her lawn. Her son mowed 1 3 of it. Who mowed most of the lawn? How much of the lawn still needs to be mowed?




HURRY!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

8/21 of the lawn still needs to be mowed.

To compare fractions, we need a common denominator. The least common multiple of 7 and 3 is 21.

Miss Lianto's fraction: (2/7) x (3/3) = 6/21

Son's fraction: (1/3) x (7/7) = 7/21

To calculate how much of the lawn still needs to be mowed, we can subtract the combined fractions mowed from the total:

Combined fractions mowed: 6/21 + 7/21 = 13/21

So, Remaining fraction: 1 - 13/21 = 8/21

Therefore, 8/21 of the lawn still needs to be mowed.

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Jen's Playground Design purchased 13 1/4 tons of sand. While creating a new elementary school playground, they used 9 1/2 tons of the sand. How much sand does the company have left?

Answers

The difference between the amount purchased and amount used  is 3.75 tons.

How much sand does the company have left?

The amount of sand the company have left is calculated as follows;

The total amount purchased = 13 1/4 tons

The amount of sand used = 9 1/2 tons

To find the difference between the amount purchased and amount used we will convert the mixed fraction into improper fraction as follows;

13 1/4 tons = 53/4 laps = 13.25 tons

9 1/2 tons = 19/2 tons = 9.5 tons

The difference between the amount purchased and amount used is;

= 13.25 tons - 9.5 tons

= 3.75 tons = 3 3/4 tons

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In 2009 the percent of unrestrained passenger vehicle occupants fatalities were 43.6% and 38.5 percent in 2018. What is the percentage change of vehicle fatalities. Round to one decimal place.

Answers

The percentage change of vehicle fatalities from 2009 to 2018 is -11.7%. The negative sign indicates a decrease in the percentage of unrestrained passenger vehicle occupant fatalities during this period.

To calculate the percentage change of vehicle fatalities from 2009 to 2018, we can use the following formula:

Percentage Change = ((Final Value - Initial Value) / Initial Value) * 100

Given:

Initial Value (2009) = 43.6%

Final Value (2018) = 38.5%

Using the formula, we can calculate the percentage change:

Percentage Change = ((38.5 - 43.6) / 43.6) * 100

= (-5.1 / 43.6) * 100

= -11.70 (rounded to one decimal place)

Therefore, the percentage change of vehicle fatalities from 2009 to 2018 is -11.7%. The negative sign indicates a decrease in the percentage of unrestrained passenger vehicle occupant fatalities during this period.

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solve the following equation for a.
[tex]t + \frac{a}{n} = f[/tex]

Answers

Making a the subject of formula in this equation t + a/n = f gives a = nf - nt.

How to make a the subject of the formula?

In this exercise, you are required to make "a" the subject of the formula in the given mathematical expression by using the following steps.

By subtracting the variable "t" from both sides of the equation, we have the following:

t + a/n - t = f - t

a/n = f - t

By multiplying both sides of the mathematical expression by n, we have the following:

n × a/n = (f - t) × n

a = (f - t)n

a = nf - nt

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Use excel and make a chart solve question 1 URGENT

Answers

The chart (a pie chart) is attached accordingly.

2) I used a pie chart because of the nature of data involved.

What is a pie chart?

A pie chart is a circular statistical visual split into slices to show numerical proportion. The arc length of each slice in a pie chart is proportionate to the quantity it shows.

Pie charts are widely used to illustrate sections of a whole or the percentage distribution of several categories when displaying data. They may be used to visualize proportions and compare distinct data points in a circular style.

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