Mathematics Middle School

Does the equation y = 4.2x represent a proportional relationship? Choose the correct response.

A. Yes. The constant of proportionality is 4.2.
B. Yes. The equation is linear.
C. No. The equation is linear.
D. No. There is a rate of change of 4.2.

Answers

Answer 1
i agree with the answer the guy saif
Answer 2

Answer:

A .The constant of proportionality is 4.2

Step-by-step explanation:

The reason its a is because the rate of increase is always going to be be multiplied by 4.2 to stay increasing on a graph.  So the constant change is always going to have to do something with 4.2

Related Questions

Help with question, best answer gets brainliest

Answers

Answer:

I think B

Step-by-step explanation:

Add 0.79 and 0.05. How many tenths are in the sum? ö

Answers

The answer is 8 tenths

Need help ASAP!! I Can give brainlist for the first right person.

Answers

Answer:

Step-by-step explanation:

1. 720,000

2. 119.50

3. 17.68

4. $75

5. 77.74

Please help with this, need the answer ASAP, please explain your reasoning for both of these!

Answers

Answer: 6

Why: (8/3)/8=3*2= 6
(54/5)/(18/5)=3*2=6

Length times height divided by 2 equals the area of a triangle so by doing the area divided by the length or height you get the other one and you just have to multiply by two to get the final answer
answer is 6 sorry if I’m too late to answer

At the end of the evening, there are just enough ingredients to make 4 pancakes. How many cups of flour will be used in this batch?

(Flour is 1 1/2)

Answers

Answer:

6 I'm pretty sure.

Step-by-step explanation:

tell me if I'm wrong, sorry if I am

find the slope of the line. y = 5/3x + 4

Answers

Answer:

slope= 5/3

Step-by-step explanation:

y=mx+b

slope=m

your welcome

A : slope is 5/3 hope this help

Please find an equivalent expression to 2(n+1)-3

Answers

Answer:

2n-1

Step-by-step explanation:

Answer:

(2n-2)-3

hope this helps

have a blessed day :)

:D

a linear function contains the following points.
what are the slope and y-intercept of this function?

Answers

Answer:

B

Step-by-step explanation:

the slope is -3

the slope is -3 so it would be B

Write a real world problem involving multiplication by a decimal factor.Then solve the problem. Write the real world problem and solve

Answers

Sample question:

Aimee bought 2 CDs each costing $11.95 and 3 CDs each costing $6.48. She paid with a $50 note. How much change did she receive?

Answer:

2 × 11.95 = 23.9

3 × 6.48 = 19.44

Total spent = 23.9 + 19.44 = 43.34

Change = 50 - 43.34 = $6.66

Answer:

if an article was bought by Amina for 2Kobo and John bought articles for 8Kobo how many articles did John buy?

1 a=2k

x a=8k

cross multiply

8k × 1 = 2k × x

8k=2k

4k

Which situation can be modeled by the inequality 3x+7<13?

Amelia can fit fewer than 13 textbooks in her school locker. She already has 7 textbooks in her locker. How many more textbooks can Amelia add to her locker?

Jake has less than $13 to spend on a taxi ride. The taxi company charges a $3 flat fee and $7 for each mile. How many miles can Jake ride in a taxi?

Larissa has fewer than 13 game tokens. The games at the arcade each require 3 tokens to play. How many games can Larissa play at the arcade?

Gabriel has less than $13 to spend on a floral arrangement. The florist charges $7 for a base floral arrangement and $3 for each additional flower. How many additional flowers can Gabriel buy?

Answers

Answer:

The last option.

Step-by-step explanation:

Less than 13

7 is $7

3x is $3 each additional flower

Need help with Slope

Answers

Answer:

(0,-1)

Step-by-step explanation:

...

Answer:

C

Step-by-step explanation:

you see the point at the bolded vertical line, yea thats the y intercept which means its (0,1)

a mine worker discovers an ore sample containing 500mg of radioactive material. it is discovered that the radioactive material has a half life of 1 day. find the amount of radioactive material in the sample at the beginning of the 7th day.

Answers

Answer:

The miner would have 3 1/2 of radioactive material in the sample at the beginning of the 7th day.

Step-by-step explanation:

hope this helped!

3 1/2 is radioactive hope this helps’

what is the rate of change when the numbers are (2,11) and (5,17)? show work

Answers

Answer:

m=2

Step-by-step explanation:

17-11 over 5-2 equals 6 over 3, which simplifies to 2

y=x^2- x + 2, y = x + 5
Solve by substitution
I need the work shown please

Answers

Here you are . i think thais is the asnwer

Tamanika received a raise in her hourly pay, from $14.00 to $19.18. Find the percent change.

Answers

Answer:

37% increase

Step-by-step explanation:

(V2−V1)|V1|×100

=(19.18−14)|14|×100

=5.1814×100

=0.37×100

=37%change

The answer is 37% increase because it is :)

PLS I NEED HELP ON THIS QUESTION

Answers

The answer is 98 degrees for y

Answer:

Step-by-step explanation:

First, you should find the angle x because it will help in solving the angle y. A straight line adds up to 180 degrees, therefore x+y = 180

For the triangle on the left, sum up the angles and set it to 180 degrees.

60 + 38 + x = 180

x = 82 degrees

Now solve for y by doing this

82 + y = 180

y = 98 degrees

While I'm here, Ill solve for z because it will most likely ask in the next question.

26 + 98 + z = 180

z = 56 degrees

Please help me I'm trying to get this done and can you please explain it!

Answers

i’m guessing it’s D because it just stops on the y-axis and if it was symmetrical then it wouldn’t be a function at all

Which equation has a constant of proportionality equal to 7?
A. 4y = 28x
B. 7y = 28x
C. 28y = 4x
D. 28y = 7x

Answers

A is correct.

Reasoning: 4 x 7 = 28


good luck!

The solution is Option A.

The equation which has a constant of proportionality k = 7 is 4y = 28x

What is Proportion?

The proportion formula is used to depict if two ratios or fractions are equal. The proportion formula can be given as a: b::c : d = a/b = c/d where a and d are the extreme terms and b and c are the mean terms.

The proportional equation is given as y ∝ x

And , y = kx where k is the proportionality constant

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Given data ,

Let the equation be represented as A

Now , the value of A is

The proportional equation is given as y ∝ x

And , y = kx where k is the proportionality constant

Now , the equation is

4y = 28x

On simplifying the equation , we get

Divide by 4 on both sides of the equation , we get

y = 28x/4

y = 7x

y = 7x is of the form y = kx where the value of k is 7

Therefore,  the value of k is 7

Hence , the value of proportionality constant is 7

To learn more about proportion click :

https://brainly.com/question/7096655

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If /_C and /_D are complementary angles, m/_C = (4x + 3), and m/_D = (15x - 8), find m/_D.

Answers

The answer is 52

You’re welcome

Write the equation of the line in fully simplified slope-intercept form.

Answers

Y=1/5x+7

The y intercept is the +7, and the fraction, 1/5 is your slope
the answer is y=1/5 +7

Nine grapefruits cost $4. Use the ratio table to determine how many grapefruits can be bought for $20.

Answers

Answer:

D. 45

_________

I need helppp ASAP plsssss

Answers

Answer:

12.56

Step-by-step explanation:

c= 2x3.14x 2km= 12.56

The answer is 10.14km because you multiple by

Simplify the expression.
–2.5(1 – 2n) – 1.5n

Answers

Answer:

9.5n - 2.5

Step-by-step explanation:

-2.5(1 - 2n) - 1.5n

distribute the -2.5 into the ( )

-2.5 + 10n - 1.5n

combine like terms

-2.5 + 9.5n

9.5n - 2.5

Hope this Helps!!!

HELP PLEASEEEE!!!!!!!!!!

Answers

I think the permeate would be 8cm, correct me I’m I’m wrong. Sorry if I got the answer incorrect

study -----------------

What would be a reasonable estimate for 2204 ÷ 22?

Answers

100.9 is a reasonable estimate !! if this helped mark me as brainliest so I can help more people !!

Solve for x, check the image below

Answers

Maybe 6 i am not sure
x = 8 because the radius is 6. 6 + 4 is 10 so that is your hypotenuse. from there you can just use the pythagorean theorem.

Nancy and Kevin collect coins. Nancy has x coins. Kevin has 4 coins fewer than three times the number of coins Nancy has. Write and simplify an expression for the total number of coins
Nancy and Kevin have.

Answers

Answer :x+3x-4= total # of coins

4x-4= total # of coins

Step-by-step explanation:

PLEASE HELP ASAP
Sorry if it’s hard to read but I have to turn this in in a few minutes and I don’t get it, you have have to sort them in 5 different piles

Answers

Answer:

If it goes through the orgin

Step-by-step explanation:

Elspeth knows that Pi times r almost-equals 9.42 centimeters. What would she need to do to find the circumference?
She could multiply 9.42 by 2.
She could multiply 9.42 by Pi.
She could divide 9.42 by 2 to find the radius, and then square the radius.
She could divide 9.42 by Pi to find the radius, and then multiply 9.42 by the radius.

Answers

Answer:

First one

Step-by-step explanation:

It will be the first one

PLS HELP ASAP GIVE BRAINLIEST TO PERSON WHO ANSWER CORRECTLY

Answers

Its greater then less I think.
It’s great than———————————-
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