Answer: 4/5 or 0.8
Step-by-step explanation:
[tex]1\frac{1}{4}[/tex] * [tex]\frac{4}{5}[/tex] = [tex]\frac{1}{1}[/tex] = 1
[tex]1\frac{1}{4}[/tex] is also equal to 1.25.
1.25 * 0.8 = 1
Answer:
4/5
Step-by-step explanation:
because 4 is half of a half two fourths are a half and 4/4 are 1 whole
If y vaires directly with x and y= 12 when x= 15. What is the value of x when
y=16?
The value of x=20, according to the given question.
What is meant by equation?
A mathematical statement with two expressions that have the same value and the sign "equal to" between them is called an equation. Take the example of 3x + 5 = 15. Equations can be of several sorts, including linear, quadratic, cubic, and others.
According to the given data in the question,
We know that y varies directly with x like that,
y=kx..................(1)
y=12 when x=15.
Now, we have to find the value of x when y=16.
Then, putting the given values of x & y in the eq. (1), and determine the value of k.
12=k(15)
[tex]k=12/15\\k=4/5\\[/tex]
Now, putting the value of k in the second statement in eq.(1), where only y's value is given.
[tex]16=\frac{4}{5}x\\ x=16*\frac{5}{4} \\x=20[/tex]
Hence, the value of x=20.
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The equation for line t can be written as y+3= 1/2(x–7). Line u, which is perpendicular to line t, includes the point (3,3). What is the equation of line u?
Write the equation in slope-intercept form. Write the numbers in the equation as simplified proper fractions, improper fractions, or integers.
The equation of a line u perpendicular to line t and passes through (3, -3) is y = -2x + 3
How to represent the slope of a line?The equation of a line can be represented in slope intercept form as follows:
y = mx + b
where
m = slopeb = y-interceptLine t has equation as y + 3 = 1 / 2 (x - 7).
Line u is perpendicular to line t and it passes through (3, -3).
The products of the slope of perpendicular lines is equals to negative 1.
Therefore,
m₁ m₂ = -1
1 / 2 m₂ = -1
m₂ = -2
Therefore, the equation of the line have a slope of -2.
let's find the y-intercept using (3, -3)
-3 = -2(3) + b
b = -3 + 6
b = 3
Therefore, the equation in slope intercept form is y = -2x + 3.
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Help me please it’s confusing
Answer: 1/6
Step-by-step explanation:
To subtract fractions, you must have a common denominator. To do this, the common multiple of 3 and 2 is 6. So 2/3 is multiplied by 2/2 and 1/2 is multiplied by 3/3. The multiplication is valid since we multiplied by one, it didn't alter the value but rather it put it into an alternate, equivalent form.
2. Determine if the diagram is a function.
Why or why not?
Please
Answer:
IT IS A FUNCTION
It is specifically a Surjective/ onto Mapping/function
Step-by-step explanation:
surjective or onto function is when y has an image in x
Answer:
The graph is a function
Step-by-step explanation:
-For every input (x) there is only one output value (y)
Since the function does not have two of the same x values for several inputs, its considered a function. If the x values do not repeat values, or if you graph the function and it does not cross on more than one point, it is also considered a function.
Ex.
X: 2, 4, 7 , 2, 5 This is not a function. More than one input for each output.
Y: 1, 2, 4, -3, 7
Ex.
X: 5, 6, -5, 8 this is a function. Exactly one input for every output.
Y: 1, 4, 5, 9
If [tex]y = \frac{(1 + x)u}{(1 + x)v} [/tex]
Find dy/dx
The value of dy/dx is ( v du/dx - u dv/dx)/v²
From the question, we have
y = (1+x)u/(1+x)v
y = u/v
dy/dx = d/dx(u/v)
d/dx(u/v) = ( v du/dx - u dv/dx)/v²
Derivatives:
A function's varied rate of change with respect to an independent variable is referred to as a derivative. When there is a variable quantity and the rate of change is irregular, the derivative is most frequently utilized. The derivative is used to assess how sensitive a dependent variable is to an independent variable (independent variable). In mathematics, a quantity's instantaneous rate of change with respect to another is referred to as its derivative. Investigating the fluctuating nature of an amount is beneficial. In calculus, a function's derivative measures how sensitively its output value changes in response to changes in its input value.
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Complete sheet below
Answer:
1: D
2: B
3: A
D: C
Step-by-step explanation:
Differentiate the function with respect to x.
Differentiation of the function [tex]f(x) = (-x^{2} - 4)x^{5}[/tex] with respect to [tex]x[/tex] is [tex]f'(x) = -7x^{6} - 20x^{4}[/tex].
What is the differentiation of the function?
A function differentiation is a method of displaying the rate of change of a function at a given moment. It is the slope of the tangent line at a point on a graph for real-valued functions.
We have,
[tex]f(x) = (-x^{2} - 4)x^{5}[/tex]
By simplifying the given function, we get
[tex]f(x) = -x^{7} - 4x^{5}[/tex]
Now, we will differentiate the given function with respect to [tex]x[/tex].
[tex]\frac{d}{dx} f(x) = \frac{d}{dx} (-x^{7} - 4x^{5})[/tex]
[tex]f'(x) = \frac{d}{dx} (-x^{7}) - \frac{d}{dx} (4x^{5}))[/tex]
[tex]f'(x) = -7x^{6} - 20x^{4}[/tex]
Hence, differentiation of the given function with respect to [tex]x[/tex] is [tex]f'(x) = -7x^{6} - 20x^{4}[/tex].
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=
4(7x), what is the value of a(-2)
The value of the function f(x) = 4 ( 7x ) for x = -2 is equal to f( -2 ) = -56.
As given in the question,
Given expression is equal to :
f(x) = 4 ( 7x )
Calculate the value of the given function for x = -2 is given by :
Substitute value of x = -2 we get.
f(-2)
= 4 ( 7 ( -2) )
Seven is positive and 2 is negative , multiplication of positive to negative is always negative.
So, 7 ( -2 ) is -14 Substitute in above equation we get,
= 4 ( -14 )
= -56
Therefore, the value of the function f(x) = 4 ( 7x ) for x = -2 is equal to
f( -2 ) = -56.
The complete question is :
If f(x) = 4 (7x) , what is the value of f(-2)?
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11. Corey bought 25 gallons of gas to fill up his pickup truck. He paid for the part of the total with a $25 gift card and was left owing $26. How much did he pay per gallon for the gas?
Answer:
I believe that the answer is $2.04, per gallon.
Step-by-step explanation:
I added the $25 he paid with the gift card, and the $26, which was $51 that Corey paid in total. Corey had gotten 25 gallons and they want to figure out how much he paid for each gallon. So we take the total he spent divided by the number of gallons he had gotten. So 51/25=2.04
Hope this helps!!!!
What transformation takes the graph of f(z) - 4z +9 to the graph of g (z) = 4x+7?
translation 2 units right
translation 2 units left
translation 2 units down
translation 2 units up
The linear function g(z) = 4 · z + 7 is the result of applying the transformation rule g(z) = f(z) - 2 (Translation two units down) on the linear function f(z) = 4 · z + 9 . (Correct choice: C)
What transformation rule is used to transform a given function?
In this problem we find a linear function that is modified into another linear function by a transformation rule. We need to find if the function is modified by a horizontal translation, a vertical translation or a combined translation, that is, a combination of horizontal and vertical translations.
Horizontal translation
g(x) = f(x - k), where k > 0 for a translation in + x direction.
Vertical translation
g(x) = f(x) + k, where k > 0 for a translation in + y direction.
After a quick inspection, we notice that linear function f(z) = 4 · z + 9 is transformed into g(z) = 4 · z + 7 by using vertical translation 2 units down. Then, we find the following transformation formula:
g(z) = f(z) - 2
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Degree 5; zeros: 7, -i, 3+i; let a represent the leading coefficient
Therefore the required polynomial is [tex]f(x) = a(x^5+13x^4+53x^3+83x^2+52x+70)[/tex]
What is an leading coefficient?
The numbers placed in front of the variable with the biggest exponent are known as leading coefficients. They can be whole numbers, fractions, or decimals, as well as positive, negative, real, or imaginary, just like conventional coefficients.
According to fundamental theorem of algebra , if a + bi be a zero of a polynomial with real coefficients then a-bi is also a zero
Now given that f(x) be a polynomial with degree 5 and with zeros -7,-i,-3+i
and f(x) be a polynomial with real coefficients.
therefore by fundamental theorem of algebra
+i and -3-i are also zeros of f(x)
so zeros of f(x) are 7, -i, -3 + i, i, -3 -i
Degree is 5, so there is at most 5 zeros therefore the required polynomial will be
f(x) = a(x + 7)(x + i )(x - i)(x +3- i)(x +3 +i)
= a[(x +7)(x² + 1)(x² +6x + 10)]
[tex]= a\left[x^5+ 13x^4 + 53x^3 +83x^2 + 52x + 70]\right[/tex]
[tex]f(x) = a(x^5+13x^4+53x^3+83x^2+52x+70)[/tex]
Therefore the required polynomial is [tex]f(x) = a(x^5+13x^4+53x^3+83x^2+52x+70)[/tex]
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The probability that a vehicle entering the Lu-
ray Caverns has Canadian license plates is 0.12; the
probability that it is a camper is 0.28; and the proba-
bility that it is a camper with Canadian license plates
is 0.09. What is the probability that
The conditional probability that a camper entering the Luray Caverns has Canadian license Plates is given by:
0.3214 = 32.14%.
What is Conditional Probability?Conditional probability is the probability of one event happening, considering the outcome of a previous event. The formula is given by the rule presented as follows:
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
The probabilities that compose the formula are listed as follows:
P(B|A) is the probability of the event B happening, given that the event A has already happened.[tex]P(A \cap B)[/tex] is the probability of both the events, A and B, happening.P(A) is the probability of the event A happening.The events in this problem are given as follows:
Event A: Camper.Event B: Canadian license plates.The probabilities are given as follows:
P(A) = 0.28, P(A and B) = 0.09.
Hence the conditional probability is obtained as follows:
P(B|A) = P(A and B)/P(A) = 0.09/0.28 = 0.3214 = 32.14%.
Missing InformationThe probability asked is that a camper entering the Luray Caverns has Canadian license Plates.
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The total cost of a plane ride, C, is given below as a function of the time flown, m, in minutes.
C = $33.00 + $1.20m
If a customer spends $267.00 on a plane ride, how many minutes does the ride last?
A. 250
B. 195
C. 223
D. 325
The number of minutes is 195 minutes when the customer spends $267.00. The correct option is B.
How to calculate the time?From the information, the total cost of a plane ride, C, is given as a function
C = $33.00 + $1.20m
where n = number of minute
Since the customer spends $267.00 on a plane ride, this will be:
C = = 33.00 + $1.20m
33 + 1.2m = 267
Collect like terms
1.2m = 267 - 33
1.2m = 234
Divide
m = 234 / 1.2
m = 195
Minutes used is 195 minutes
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GCF ( 160, 320, 480)
The greatest common factor of 160, 320 and 480 will be 160.
What is the Greatest Common Factor?The largest positive number that can be evenly divided into the supplied numbers is the most common factor. The largest number that evenly divides all the specified numbers is the greatest common factor.
In maths, the largest positive integer that divides each of the integers is known as the greatest common divisor of two or more integers that are not all equal to zero. The greatest common divisor of two numbers x and y is represented by the symbol GCD(x,y)
Assumed to be 160, 320 and 480. The numbers are factored to determine the largest common factor.
Factorize number 160
160 = 2×2×2×2×2×5
Factorize number 320
320 = 2×2×2×2×2×2×5
Factorize number 480
480 = 2×2×2×2×2×3×5
The common number between all three numbers is 2⁵×5. Therefore, the greatest common factor of 160, 320 and 480 will be 160.
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Dylan has a bag of 1256 rubber balls to hand out as prizes at a town festival. There are 13 games at the festival. About how many rubber balls should he give each game?
Answer The answer is 96 but as a fraction 96 8/13
Step-by-step explanation: There are 1256 rubber bands and 13 games to distribute them according to the problem; therefore, to divide to give an equal amount per each group for each game, you would give out 96 rubber bands each time, so 96 is the answer or 96 8/13.
Help pls I need a fraction answer
7 4/10 + 2/10 =
Answer: 7 4/10 + 2/10 = 38/5 = 7 3/5 = 7.6
Answer Overall : 38/5
Step-by-step explanation: Conversion a mixed number 7 4/10 to a improper fraction: 7 4/10 = 7 4/10 = 7 · 10 + 4/10= 70 + 4/10= 74/10
To find a new numerator:
a) Multiply the whole number 7 by the denominator 10. Whole number 7 equally 7 * 10/10 = 70/10
b) Add the answer from previous step 70 to the numerator 4. New numerator is 70 + 4 = 74
c) Write a previous answer (new numerator 74) over the denominator 10.
Seven and four tenths is seventy-four tenths
Add: 74/10 + 2/10 = 74 + 2/10 = 76/10 = 2 · 38/2 · 5 = 38/5
The common denominator you can calculate as the least common multiple of both denominators - LCM(10, 10) = 10. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 10 × 10 = 100. In the following intermediate step, cancel by a common factor of 2 gives 38/5.
In other words - seventy-four tenths plus two tenths is thirty-eight fifths.
First convert the mixed number to a fraction by multiplying 7 by 10 and adding 4
74/10+2/10add them together but DONT add the denominators
76/10These numbers can be simplified by 2 so the final answer is:
38/5Name the image of R(1, 2) after a 270 rotation about (0, - 2)
The image after a 270 rotation is (4, -3)
How to determine the image after rotation about a point?
If the point of rotation is not the origin, the steps are as follows:
1. Subtract the point of rotation off each vertex point of
the shape
2. Rotate as you would around the origin
3. Add the point of rotation back to each vertex point of
the shape
Given: R(1, 2) after a 270 rotation about (0, - 2)
step1: (1-0, 2-(-2)) = (1, 4)
step 2: For rotation about the origin through 270°, the image is (y, -x). Thus, (1, 4) => (4, -1)
step 3: (4, -1) => (4+0, -1+(-2) ) = (4, -3)
Therefore, the image of R(1, 2) after a 270 rotation about (0, - 2) is (4, -3)
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What are the slope and vertical intercept of 5x+7y=10
Answer:
-5/7, 10/7
Step-by-step explanation:
The slope of an equation in standard form is -a/b
so -5/7
Set x to 0 to find the vertical intercept
5(0)+7y=10
7y=10
y=10/7
on a standardized exam the scores are normally distributed with a mean of 70 and a standard deviation of 20. find the z of a person who scored 128 on the exam
The z-score of a person who scored 128 on the exam is equal to 2.9
What is a z-score?A z-score is also referred to as a z-value or standard score and it can be defined as a measure of the distance between a raw score and the mean, when standard deviation units are used.
Mathematically, the z-score of a given sample score in a normal distribution can be calculated by using this formula:
[tex]z=\frac{x\;-\;u}{\sigma}[/tex]
Where:
x represents the sample score.u represents the mean score.σ represents the standard deviation.Substituting the given parameters into the formula, we have;
Z-score, z = (128 - 70)/(20)
Z-score, z = 58/20
Z-score, z = 2.9
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An online electronic store's sales are currently increasing at a rate of 2.7% monthly. If they had $65,000 in sales for this month, what will their sales be in 1 year?
The Sales of the electronic store in 1 year is 66,776.88
Applications of Compound interest:
Compound interest is an interest that is calculated on the principal and the interest accumulated over the previous period. The concept of compound interest can be used in different types of situations like an Increase in population or a decrease in population, Depreciation, or increasing the value of an item, etc.
The formula for compound interest is given by
Total amount, A = P(1 + r/n)^nt
where P = initial amount
r = rate of increase
n = number of compounds in year
t = time period in years
Here we have,
The rate of increase in sales r = 2.7% (per monthly)
=> r = 2.7/100 = 0.027
Here sales are increased monthly
then the number of compounds per year = 12
Sales in this month, P = 65000
From above formula
Sales in 1 year, A = 65000(1 + 0.027/12)¹²
= 65,000(1 + 0.00225)¹²
= 66,776.88
Therefore,
Sales of the electronic store in 1 year = 66,776.88
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Please help! I will award top rating for the first to help! (the questions are on the image)
It needs to be fully simplified!
Answer:
Step-by-step explanation:
4x(power of 5) divided by x(power of 2)
5y(po7) div by y(po2)
not 100% sure as i havent learnt this before lol
Select the correct answer.
Consider the function given below.
f(x) = lx-5l +2
Which of the following statements about the y-values of the graph of the function is true?
A. The y-values are all greater than or equal to 5.
B. The y-values are all greater than or equal to 2.
C. The y-values are all less than or equal to 2.
D. The y-values are all less than or equal to 5.
Step-by-step explanation:
the list of your answer options has a different sequence than the picture.
I assume the picture shows us the correct sequence.
the correct answer is
D : the y-values are all greater than our equal to 2
why ?
because the term in absolute value can only go down to 0 but not below. it is an absolute value after all : it is always positive (minimum 0), no matter what.
so, the minimum value of the function is 0 + 2 = 2. it cannot get lower than this.
Ana runs 3/4 in 6 minutes. Fill in the missing values in the table. Using
the table, find the constant of proportionality. Then write an equation to
represent this relationship. Lessons 2-3 7.AR.4.2
Answer:
In the first one you should write: 6, because the test tells you that in 6 minutes she runs 3/4miles.
So in 12 minutes she runs (3/4miles)*2. (basically 3/4 miles in the first 6 minutes, and other 3/4 miles in the remaining 6munutes).
So in the second space you can write 12, and on the right 2*(3/4), which is... (3/2).
To find the equation:
3/4 = 6
(3/4)*2= 6*2
so we know that in 1 minute we do 1/8miles, and now we have our formula. (1/8)*6=1*6
the formula is: y(miles) =(1/8)*x
in fact is x=6 minutes, y= (1/8)*6, so y=3/4.
solve the absolute value inequality.
|-3x|-7≥ 11
Answer:
x ≥ 6
Step-by-step explanation:
|-3x| - 7 ≥ 11 The absolute value of -3x is 3x
3x - 7 ≥ 11 Cancel the 7 by adding it on both sides
3x ≥ 18 To get x by itself divide 3 on both sides
x ≥ 6
How long is 10:00am to 5:00 pm
Answer:
7 hours.
Step-by-step explanation:
Use a clock and count forward.
The heights of the low tides for four days are -0.22 ft, 2.64 ft, -0.22 ft, and 2.64 ft. What is the mean height of the low tides? (I need to show work.)
The mean height of the low tides is 1.21 ft
The heights of the low tides for four days are -0.22 ft, 2.64 ft, -0.22 ft, and 2.64 ft
The mean of a sample is given by the formula =
summation of all observation / number of observation
mean = (x₁ + x₂ + x₃ + x₄)/ 4
mean = -0.22 + 2.64 - 0.22 + 2.64 / 4
mean = 4.48 / 4 = 1.21
Therefore, the mean height of the low tides is 1.21 ft
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what is the probability that a random sample of 20 second grade students from the city results in a mean reading rate of more than 97 words per minute
The probability that a random sample of 20 second grade students from the city results in a mean reading rate of more than 97 words per minute is; 0.012676.
How to find the probability from z-score?
This z-score is used to tell us the number of standard errors that exists between the sample mean and the population mean.
The formula for z-score here is;
z = (x' - μ)/(σ/√n)
where;
x' is sample mean
μ is population mean
σ is standard deviation
n is sample size
We are given;
Sample mean; x' = 97
Population mean; μ = 91
Standard deviation; σ = 10
Sample size; n = 20
Thus;
z = (x' - μ)/(σ/√n)
z = (97 - 91)/(10/√20)
z = 2.236
From online p-value from z-score calculator, we have;
p = 0.012676
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Complete question is;
The reading speed of second grade students in a large city is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm.
what is the probability that a random sample of 20 second grade students from the city results in a mean reading rate of more than 97 words per minute
A test consists of 10 true/false questions. To pass the test a student must answer at least 7 questions correctly. If a student guesses each question, what is the probability that the student will pass the test?
The probability that the student will pass the test, using the binomial distribution, is of:
0.172 = 17.2%.
What is the binomial distribution formula?The formula that gives the probability of x successes is presented as follows:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
The parameters of the formula are listed as follows:
n is the number of trials of the experiment.p is the probability of a success on a single trial of the experiment.In the context of this problem, the values of these parameters are given as follows:
n = 10, as there are 10 questions.p = 0.5, as each question has two outcomes, and the student will guess the answer at random.The probability of passing is given by:
P(X ≥ 7) = P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10).
In which:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 7) = C_{10,7}.(0.5)^{7}.(0.5)^{3} = 0.1172[/tex]
[tex]P(X = 8) = C_{10,8}.(0.5)^{8}.(0.5)^{2} = 0.0440[/tex]
[tex]P(X = 9) = C_{10,9}.(0.5)^{9}.(0.5)^{1} = 0.0098[/tex]
[tex]P(X = 10) = C_{10,10}.(0.5)^{10}.(0.5)^{0} = 0.0010[/tex]
Then:
P(X ≥ 7) = P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10) = 0.1172 + 0.0440 + 0.0098 + 0.0010 = 0.172 = 17.2%.
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A cable TV company has 3400 customers paying $130 each month. If each $1 reduction in price attracts 50 new customers, find the price that yields maximum revenue.
The price that yields maximum revenue is equal to $99. Also, the maximum revenue is equal to $490,050.
How to determine the unit price that yields a maximum revenue?In order to determine the price that would yield the maximum revenue, we have to find the derivative of the revenue function R(p) by applying the Power Rule.
Mathematically, the revenue function, R(p) is given by this mathematical expression:
Revenue function, R(p) = NP
Where:
N represents the number of customersP represents the monthly price of the subscriptionLet the variable n represent the number of reductions in the price. Therefore, we have:
N = 3,400 + 50n ....equation 1.
P = 130 - n
n = 130 - P
From equation 1, we have:
N = 3,400 + 50(130 - P)
N = 3,400 + 6,500 - 50P
Next, we would re-write the revenue function R(p) as follows:
Revenue function, R(p) = (3,400 + 6,500 - 50P)P
Revenue function, R(p) = 3,400P + 6,500P - 50P²
Revenue function, R(p) = 9,900P - 50P²
Taking the derivative of R(p), we have:
R'(p) = 9,900 - 100P
100P = 9,900
Price, P = 9,900/100
Price, P = $99
For the the maximum revenue, we have:
Maximum revenue, R(p) = 9,900P - 50P²
Maximum revenue, R(p) = 9,900(99) - 50(99)²
Maximum revenue, R(p) = 980,100 - 490,050
Maximum revenue, R(p) = $490,050.
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Complete Question:
A cable TV company has 3400 customers paying $130 each month. If each $1 reduction in price attracts 50 new customers, find the price that yields maximum revenue. Find the maximum revenue.
The measure of the largest angle in a triangle is 110° larger than the sum of the measures of the other two angles. The measure of the smallest angle is three-
quarters the measure of the middle angle. Find the measure of each angle.
Measure of largest. smallest and middle angle of a triangle under given conditions is 145°, 15° and 20° respectively.
What is angle sum property of a triangle?
Angle sum property of triangle states that the sum of interior angles of a triangle is 180°.
According to the given question:
Let the measure of middle angle = x
The measure of the smallest angle is three-quarters the measure of the middle angle.
∴ Smallest angle = (3/4)x
The measure of the largest angle in a triangle is 110° larger than the sum of the measures of the other two angles.
∴ Largest angle = 110° + x + (3/4)x
Now, by Angle sum property of a triangle
x + (3/4)x + 110° + x + (3/4)x = 180°
On solving for the value of x we get
2x + (3/2)x = 70°
7x = 140°
x = 20°
Therefore,
measure of middle angle x = 20°
measure of smallest angle (3/4)x = 15°
measure of the largest angle 110° + x + (3/4)x = 145°
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