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3 years ago

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Mathematics

1 answer:

Schach [20]3 years ago

3 0

I hope this helps you

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A washer and dryer cost $803 combind the washer costs $47 less then the dryer whats is the cost of the dryer

Naddik [55]

Answer:

the dryer costs $425

Step-by-step explanation:

x = washer

y = dryer

x + y = 803

x = y - 47

using the second equation a substitute in the first equation we get

y - 47 + y = 803

2y = 850

y = $425

FYI

x = y - 47 = 425 - 47 = $378

3 0

3 years ago

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At a grocery store, the price of a watermelon is determined by how many pounds the watermelon weighs. The price of a watermelon

Alexxx [7]

Answer:

$p=0.60w$

Step-by-step explanation:

Let

p ----> the price of a watermelon in dollars

w ---> the weight of a watermelon in pounds

In this problem we have a proportional relationship

Remember that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem

$p=kw$

The value of the constant of proportionality k is the same that the unit rate

Find out the unit rate

Divide the total cost by the total weight

$k=\frac{4.38}{7.3}=\$0.60\ per\ pound$

substitute in the equation

$p=0.60w$

7 0

3 years ago

What is -4x+5y if x is 3 and y is 5

klasskru [66]

The answer is 13 hope this helps

6 0

3 years ago

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Write 3/4 as a decimal

ahrayia [7]

Answer:

0.75

Step-by-step explanation:

6 0

2 years ago

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How do you tell whether the ratios form a proportion

valkas [14]

Set them up like this example:

4 8
_ = _

6 12

cross multiply by multiplying 4 by 12 and 6 by 8.
If they are equal then it is proportional.

3 0

3 years ago