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fomenos
3 years ago
9

Describe some data that when graphed would represent a proportional relationship. Explain your reasoning

Mathematics
2 answers:
OLga [1]3 years ago
7 0
The lines would go up and over at the same rate. They would have the same slope, like parallel lines.

Hope this helps!! :)
Alex787 [66]3 years ago
7 0

Answer:

A proportional relationship is "two quantities vary directly with each other."

Example:

The amount of gasoline you fill in your car and the amount you pay is a proportional relationship.

If 1 gallon of gasoline is $3, then the cost of 3 gallons of gasoline is $9.

Step-by-step explanation:

A relationship is between two quantities.

A proportional relationship is "two quantities vary directly with each other."

Say, if the quantity "x" increases, then the associated quantity "y" also increases.

For example,

y = 2x

Let's find the data.

<u>x </u>                <u>y</u>

0                 0

1                  2

2                 4

3                  6

As you can see when the value of "x" increases, the value of "y" also increases.

This is called proportional relationship.

Example:

The amount of gasoline you fill in your car and the amount you pay is a proportional relationship.

If 1 gallon of gasoline is $3, then the cost of 3 gallons of gasoline is $9.

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Mr. Wayne sells calculators. He marks up every item with a profit of 25%. Let x be his cost for a calculator. A. Write an expres
Leona [35]

Answer:

Step-by-step explanation:

%profit = selling price - cost price/cost price * 100

If Mr. Wayne marks up every item with a profit of 25% and x be his cost for a calculator, the expression for the selling price can be gotten by substituting the parameters into the formula;

25 = sp-cp/cp * 100

25/100 =  sp-x/x

0.25 = sp-x/x

cross multiply

0.25x = sp-x

add x to both sides

0.25x+x = sp-x+x

1.25x = sp

selling price = 1.25x

<em>Hence an expression for the selling price of the calculator is 1.25x</em>

<em></em>

b) If Mr wayne paid $25, the selling price is derived by substituing x = $25 into the expression in (a)

selling price = 1.25x

selling price = 1.25($25)

selling price = $31.25

c) If the selling price is $86, to get the cost of the calculator, substitute the selling price into the expression in (a)

selling price = 1.25x

$86= 1.25x

x is the cost price of the calculator

divide both sides by 1.25

$86/1.25= 1.25x/1.25

x = $68.8

<em>Hence Wayne paid $68.8 for a calculator that he sells for $86.</em>

8 0
3 years ago
Kelsey has saved 35dollars towards the cost of a 390 dollar video game system. In the weeks to come, she plans to save an additi
jeyben [28]
She need 35.5 week to buy this video games system
4 0
3 years ago
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Which shape is both a rectangle and a square?<br> please help i’ll rate you brainliest
erastova [34]

Answer:

The red square because if u cut it from the side u get to triangles.

Step-by-step explanation:

7 0
3 years ago
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23j-21g+20e-13+52e-37j+45-49e<br> (Like terms)
eduard

The solution to the algebraic expression is: 23e - 21g - 14j + 32

What are algebraic expressions?

Algebraic expressions are mathematical expressions that contain variables, coefficients, and arithmetic operations such as addition, subtraction, division, and multiplication.

Solving algebraic expressions are an important part of mathematics as it helps to improve the aptitude and solving skills of the students.

From the given information, we have;

23j - 21g + 20e - 13 + 52e - 37j + 45 - 49e

let's rearrange by taking the like terms to the same sides;

= 23j -37j - 21g + 20e + 52e - 49e - 13 + 45

= -14j - 21g + 23e + 32

= 23e - 21g - 14j + 32

Therefore, we can conclude that the solution to the algebraic expression is: 23e - 21g - 14j + 32

Learn more about solving algebraic expressions here:

brainly.com/question/4344214

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3 0
2 years ago
hat is the speed of a wave if the wavelength is 18 m and the frequency is 35 Hz? (Quick Hurry, need answer)
Andrew [12]
The speed is 630mp/s I think. Because you have to multiply Wavelength by Frequency to get true speed
3 0
3 years ago
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