PLEASE HELP ASAP!! 30 POINTS FOR ANSWERS!!
Answer:
Step-by-step explanation:
Please help, i cant figure it out.
Answer:
this can be impossible
Step-by-step explanation:
3 ratios equivalent to 6:10
Answer:
20:12 32:50 24:40 3:5 14:40
Annabelle wanted to find the y value for when x is 0 (y intercept). Here are her steps. Did Annabelle make a mistake? If so, which one? If not, indicate that as well
Answer:
Step-by-step explanation:
Annabelle did not make a mistake. you have to substitute 0 in for x then dived the equation by 2 giving you the answer of 4. She is correct. A rockstar as the answer says. :) hope this helped!
======================================================
Reason:
She wants to find the y value when x = 0. This is why she replaced every copy of x with 0. Step 1 is correct.
Step 2 is also correct because 3 times 0 is 0. She multiplied correctly.
Step 3 is correct because she needs to undo the "2 times" that is applied to y, in order to isolate it. Division is the inverse operation of multiplication.
Step 4 is correct because 8/2 is 4
Every step she did is correct, and so is the final answer.
------------
Here's one way Annabelle could check her work
3x+2y = 8
3*0+2*4 = 8 .... plug in x = 0 and y = 4
0 + 8 = 8
8 = 8
We get the same thing on both sides, which confirms that x = 0 pairs up with y = 4. In other words, (x,y) = (0,4) is a solution to 3x+2y = 8.
The point (0,4) is on the line 3x+2y = 8. This point is the y intercept where the graph crosses the y axis.
|5+5-8| how to I solve this and the answer it
Find the length of the arc of a circle of radius 5 inches subtended by a central angle of 220 degrees. Round your answer to the nearest hundredth.The length of the arc is Answer inches.
Given:
a circle of radius = r = 5 inches
We will find the length of the arc subtended by a central angle of 220 degrees
We will use the following formula:
[tex]arc\text{ }length=\theta *\frac{\pi}{180}*r[/tex]Substitute with r = 5, and θ = 220
So, the langth of the arc will be as follows:
[tex]220*\frac{\pi}{180}*5=19.19862[/tex]Rounding to the nearest hundredth
So, the answer will be the length of the arc = 19.20 inches
−5 1/3÷2 3/4 PLEASE HELP MEEEEEEEEEEEEEEEEEEEEE
Answer:
[tex]\sf -1\dfrac{31}{33}[/tex]
Step-by-step explanation:
Fraction division:
First convert mixed fraction to improper fraction.[tex]\sf -5\dfrac{1}{3}=\dfrac{-16}{3}\\\\\\2\dfrac{3}{4}=\dfrac{11}{4}[/tex]
Use KCF method. Keep the first fraction. Change division to multiplication and flip the second fraction.[tex]\sf \dfrac{-16}{3} \ \div \ \dfrac{11}{4}=\dfrac{-16}{3}*\dfrac{4}{11}[/tex]
[tex]\sf = \dfrac{(-16)*4}{3*11}\\\\=\dfrac{-64}{33}\\\\[/tex]
Now, convert improper fraction to mixed fraction.[tex]\sf = -1\dfrac{31}{33}[/tex]
Answer: -64/33 or -1 31/33
Step-by-step explanation:
First, whenever you are dividing mixed fractions we always convert them to an improper fraction, so let’s do that first.
We multiply the whole number to the denominator and then add that number to the numerator.
-5 1/3
This would be (-5*3) + -1(note that since it’s a negative number, we would have to subtract this
= -16, and add the original denominator 3 also, so it’s -16/3
Do the same for 2 3/4
(2*4) + 3 = 11
11/4
(-16/3) / (11/4)
Now to convert this expression into multiplication, we use the reciprocal(flipped version) of the divisor
11/4 would become 4/11
Which makes the expression:
(-16/3) * (4/11)
Now just multiply the denominators with each other and the numerators
-16*4 = -64
3*11 = 33
Your answer would be -64/33 or in mixed fraction form, -1 31/33
Find LCM and HCF by applying the prime factorization 17,23,29
LCM of 17, 23, 29 = 11339
HCF of 17, 23, 29 = 1
How to find LCM and HCF by prime factorization?
The numbers 17, 23, 29 are prime numbers themselves.
By prime factorization we consider only the prime factors.
LCM of 17, 23, 29 = 17 ×23 ×29 (Since the numbers are prime)
=11339
HCF of 17, 23, 29 = 1 (Since the common factor is 1)
What is prime factorization?
Writing all numbers as the product of primes is a procedure known as prime factorization. It entails determining which prime numbers combine to produce the original number.Exactly two elements, 1 and the number itself, define a prime number. It is the process of dissecting a number into the prime numbers that help the number when multiplied come into existence.To learn more about prime factorization, refer:
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the product of (5ab) and (- 2a^2 b)^3
The product expression (5ab) x (- 2a²b)³ has a value of -40a⁷b⁴, when evaluated
How to determine the product of the expressions?The expressions are given as
(5ab) and (- 2a^2 b)^3
This means that
The product expression is the product of (5ab) and (- 2a²b)³
Rewrite the expression as:
(5ab) x (- 2a²b)³
Open the brackets in the above expression
So, we have
(5ab) x (- 2a²b)³ = 5ab x (-2)³ x (a²)³ * (b)³
Evaluate the exponents
So, we have
(5ab) x (- 2a²b)³ = 5ab x (-8) x a⁶ * b³
Evaluate the products of the variables
This gives
(5ab) x (- 2a²b)³ = 5a⁷b⁴ x (-8)
Evaluate the other products
This gives
(5ab) x (- 2a²b)³ = -40a⁷b⁴
Hence, the value of the product expression is -40a⁷b⁴
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Algebra Questions I need help with!
The quadratic equations are given as follows:
37. y = 1.6(x² - 2x - 3).
38. y = x² - x.
39. y = 0.4074(x² - 12x + 11).
Item 37The roots of the quadratic equation are at x = -1 and x = 3, hence it can be written as follows:
y = a(x + 1)(x - 3)
In which a is the leading coefficient.
Hence:
y = a(x² - 2x - 3)
When x = 1, y = -8, hence the leading coefficient a can be found as follows:
-8 = a(1 - 2 - 3)
5a = 8
a = 8/5
a = 1.6
Hence the equation is:
y = 1.6(x² - 2x - 3).
Item 38The roots of the quadratic equation are at x = 0 and x = 1, hence it can be written as follows:
y = ax(x - 1)
Hence:
y = a(x² - x)
When x = 2, y = -2, hence the leading coefficient a can be found as follows:
2 = a(2² - 2)
2a = 2
a = 1.
Hence the equation is:
y = x² - x.
Item 39The roots of the quadratic equation are at x = 1 and x = 11, hence it can be written as follows:
y = a(x - 1)(x - 11)
Hence:
y = a(x² - 12x + 11)
When x = 2, y = -11/3, hence the leading coefficient a can be found as follows:
-11/3 = a(4 - 24 + 11)
9a = 11/3
a = 11/27
a = 0.4074.
Hence the equation is:
y = 0.4074(x² - 12x + 11).
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Find the coordinates of the vertices of the image: rotate pre-image QRST 90° clockwise.
-2,-1
1,-3
3,3
0,2
Answer:
T(2,-1)
Q(3,1)
S(0,-2)
R(3,-3)
Justin has 71 newspapers to deliver in 3 days. He
delivers the same number of newspapers each day.
How many newspapers does Justin deliver each day
How many newspapers are left over?
why is the central limit theorem so important to the study of sampling distributions? group of answer choices it allows us to disregard the shape of the sampling distribution when the size of the population is large. it allows us to disregard the shape of the population when n is large. it allows us to disregard the size of the sample selected when the population is not normal. it allows us to disregard the size of the population we are sampling from.
Answer:
It allows us to disregard the shape of the population when n is large.
Step-by-step explanation:
When the sample size is large it gets close to a normal distribution regardless of the actual distribution shape of the population.
Choose all equations that are NOT true.
350x10³=36,000
0.36x100=3,600
360x10¹ =36.0
0000
0.036x1,000=36
36x10¹ = 36
Answer:
They're all false??? Do them on a calculator!
utilizand ciurul lui erastone gasiti toate mr prime mai mici decat 100
Answer: 100
Step-by-step explanation:
The table below shows the number of miles Tony ran and the calories he burned per mile.
CALORIES BURNED
PER MILE
Miles
OB 200
OC. 240
Celories
Which number completes the table?
O A 160
D. 180
60
2
The required number of calories burned at the 4 miles of running is 160 calories. Option A is correct.
The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
The rate of the calorie burning per mile = 40 calorie/mile,
For the running of the 4 miles,
Calorie burned at 4 mile of running = 40 (4) = 160 calories,
Thus, the required number of calories burned at the 4 miles of running is 160 calories.
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four red balls and three green balls are placed in a bag. if you take two of the balls out of the bag without replacement, what is the probability that both balls are red? (enter your probability as a fraction.)
The probability of both balls being red is 2/7
Given that there are four red balls and three green balls in a bag and two of the balls are out of the bag without replacement.
We must find the probability that both balls are red.
Let us consider,
Probability of drawing a red ball = 4 red balls / 7 total balls
1st draw is (4/7)
None are replaced, (put back in the bag) so now there are 3 red balls in a bag of 6 total balls.
2nd draw is 3/6 = (1/2)
Multiply the probabilities together to find the chance of drawing red 2 times in a row.
= (4/7) * (1/2)
= 2/7
Hence, the probability that both balls are red is 2/7
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The equation 2x^2 - 3x - (k+1)=0 where k is a constant has no real roots. Find the set of possible values of k
The set of possible values of k is (-17/8, ∞).
What are the conditions for a quadratic equation not to have real roots?
A quadratic function has no actual roots and the parabola it represents does not intersect the x-axis if its discriminant is less than zero.
What is the discriminant of a quadratic equation?
A polynomial's discriminant is a function of its coefficients and is denoted by a capital "D" or the symbol for the delta (Δ). In any quadratic equation where a, b, and c are rational numbers, it demonstrates the nature of the roots. With a quadratic equation, the real roots or the number of x-intercepts are easily demonstrated. This equation is used to determine if the quadratic equation's roots are real or imaginary.
For a quadratic equation as ax² + bx + c = 0, the discriminant is
Δ = b² - 4ac
Given, the quadratic equation is 2x² + (-3)x + (-1 - k) = 0
Comparing this to the standard form of quadratic equation, the value of the discriminant is: Δ = b² - 4ac = (-3)² - 4(2)(-1 -k) = 9 + 8(k + 1) = 17 + 8k
Following the condition established in the literature above, Δ<0
Therefore, 17 + 8k < 0 ⇒ 17 < -8k ⇒ k > (-17/8)
Thus, the set of possible values of k is (-17/8, ∞)
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Order the numbers from least to greatest. PLEASE HELP
Answer:
22/7, _/32/3, 3.3, _/11
Step-by-step explanation:
Write an inequality for the word phrase: A number less than 12 is more than "-16"
Explanation:
x = some unknown number
"A number less than 12" translates to x < 12
This number x is also more than -16, so x > -16 which is the same as -16 < x
Combine -16 < x with x < 12 to end up with -16 < x < 12
x is between -16 and 12, excluding both endpoints.
A number line diagram might help picture what is going on.
Answer:
-16<x< 12
Step-by-step explanation:
it's simple algebra. -16 is less than x which x is less than 12. X is more than -16 but less than 12
An engineer designed a scale model of a 1940 Ford pickup truck using a scale in which 2 inches represents 3 feet. The length of the 1940 Ford pickup truck is 15.75 feet
According to the concept of scales, the scale length of the scale model of the 1940 Ford pickup truck is 10.5 inches.
How to determine the length of a scale model?
Scale models are useful resource to describe huge and tiny system at a reasonable scale, whose dimensions are derived from the concept of scale, which relates scale lengths to real lengths in the following manner:
d' = r · d
Where:
d - Real length, in feet.d' - Scale length, in inches.r - Scale, in inches per feet.If we know that d = 15.75 ft and r = 2 / 3 in / ft, then the scale length of the 1940 Ford pickup truck is:
d' = (2 / 3 in / ft) · (15.75 ft)
d' = 10.5 in
By using the concept of scale, the length of the scale model is 10.5 inches.
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Which of the following scenarios demonstrates an exponential decoy
(C) "A dollar's value is impacted by ongoing inflation" best demonstrates an exponential decay.
What is exponential decay?When something's growth declines as a function of an exponential, this is known as exponential decay. If a quantity declines at a rate proportional to its current value, exponential decay may be present. The following differential equation, where N is the quantity and λ is a positive rate known as the exponential decay constant, can be used to represent this process symbolically:dN/dt = -λNSo, only one of the options in this case—the dollar value being affected by constant inflation—seems to exhibit exponential decay.
As a result, the value of a dollar that is subject to constant inflation exhibits exponential decay.Therefore, (C) "A dollar's value is impacted by ongoing inflation" best demonstrates an exponential decay.
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The correct question is given below:
Which of the following scenarios demonstrates an exponential decay?
A. Value of a dollar invested in a savings account
B. Value of a dollar affected by constant deflation
C. Value of a dollar affected by constant inflation
D. None of the above
What is 10 time 5000?
Suzanne completed a 1500-piece jigsaw puzzle in 4 hours 10 minutes. What was her average speed in pieces per minute?
ANSWER: 150
EXPLANATION
Based on the given conditions, formulate: 1500 divided 10
Cross out the common factor: 150
get the result: 150
Answer: 150
your welcome
If the cost of buying three sodas and a candy bar are given by the expression 3c + 1.50, where c is the cost of a soda can.
What is an equivalent expression to the cost?
Select ALL that apply.
Select all that apply
A1.50 +3c
B (0.50 + c)3
C 3.50c +1
D 3(c+0.50)
E 4.50c
Answer: A, B, D
Step-by-step explanation:
1) Find all expressions that will result in 3c + 1.50
A) 1.50 + 3c
= 3c + 1.50
Yes!
B) (0.50+c)3
=1.5+3c
= 3c + 1.50
Yes!
C) 3.50c + 1
No!
D) 3(c+0.5)
=3c+1.50
Yes!
E) 4.50c
No!
Answer:
Step-by-step explanation: A,B,D
An iPhone costs £825 in London, €950 in Paris and $1,200 in New York.
Using £1 = €1.12 and £1 = $1.43, state the lowest price of the iPhone in £.
Give your answer to 2 dp.
The price of iphone in £ will costs £825 in London, £848.21 in Paris and £839.16 in New York .The lowest value of iphone in London which costs £825.
We had given the following information that An iphone costs £825 in London, €950 in Paris and $1,200 in New York.
We have to find the lowest price of iphone among the given iphone prices
We had to find the lowest price in £ .
Therefore we have to convert all the given prices into £.
For the conversion of prices we had given that £1 = €1.12 and £1 = $1.43.
Now In Paris iphone costs €950. Converting €950 into £ will be as follows
£1 = € 1.12.
∴ £x = € 950.
∴ x = £848.21.
Now In New York iphone costs $1,200. Converting $1,200 into £ will be as follows
£1 = $1.43.
∴ £x = $1,200
∴ x = £839.16.
Now the price of iphone in £ will costs £825 in London, £848.21 in Paris and £839.16 in New York.
Therefore by comparison we get the lowest value of iphone in London which costs £825.
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The formula shown can be used to find A, the amount of money Ricardo has in his savings account.
A
=
P
+
P
r
t
Ricardo wants to find r, the rate of interest his money earns. Which equation is correctly solved for r?
Simple interest is the interest calculated on the principal at a given rate for a time period.
The equation used to solve for the rate of interest r is r = (A/P - 1) / t.
What is simple interest?It is the interest calculated on the principal at a given rate for a time period.
We have,
A = P + Prt ______(1)
A = amount
P = principal
r = rate
t = time in years
To find the rate of interest we will have to solve (1).
A = P + Prt
A = P (1 + rt)
A/P = 1 + rt
Subtract 1 on both sides.
A/P - 1 = rt
Divide t on both sides.
(A/P - 1) / t = r
r = (A/P - 1) / t
Thus,
The equation used to solve for the rate of interest r is r = (A/P - 1) / t.
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A freshman class has 575 students. A random sample of 50 students found that 12 students prefer football to basketball. Estimate the number of freshman who prefer football to basketball.
Approximately
___________ freshmen prefer football.
The number of freshman who prefer football to basketball is 138 students
How to calculate the value?It should be noted that the random sample of 50 students found that 12 students prefer football to basketball.
The students that prefer football will be:
= Fraction × Total number of students
= 12/50 × 575
= 6900/50
= 138
There will be 138 students.
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6) An architectural drawing of a building shows the elevation of the basement floor as -12 feet. The elevation of the roof is 32 feet. Someone is standing at an elevation of 15 feet. Is the person closer to the basement or the roof? Explain.
We need to simply find the difference in height to solve this problem. The person standing at an elevation of 15 feet is closer to the basement.
The elevation of the basement is said to be 12 feet and the elevation of the roof is 32 feet. The person is standing at an elevation of 15 feet. Inorder to find whether the person is closer to the basement of the roof we need to find the difference in height of the person from the basement and from the roof. The difference in height between the person and the basement is 15-12=3 feet and the difference between the height of the person and the roof is 32-15=17 feet. Since 3 is less than 17 the person is closer to the basement.
Therefore the person standing at an elevation of 15 feet is closer to the basement.
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The time it takes to read 5 pages of a book can be represented with the equation y equals 4.5 divided by 5 times x, where y represents the total time in minutes and x represents the number of pages read.
Determine how long it will take to read a book that has 218 pages.
Time take to read a book that has 218 pages is 196.2
According to the question, given that
Time takes to read 5 pages of a book can be represented equation y equal to 4.5 divided by 5 times
where y represents the total time in minutes and x represents the number of pages read
Time take to read a book that has 218 pages.
x = [tex]218*\frac{4.5}{5}[/tex]
= [tex]\frac{981}{5}[/tex]
= 196.2
Therefore, we get time 196.2 to read a book that has 218 pages.
Depending on which values you input into the reading time , you can find out:
- How much time per day should you allocate to finish in x days;
- How much time does it take to read this book
- What the total reading time will be (in hours);
- How many pages you'll be able to read in a given time; and
- How fast you should read to finish this book on time.
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Answer:
Time take to read a book that has 218 pages is 196.2
Step-by-step explanation:
