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3 years ago

Solve the proportion 5/12=y/15 with an explanation

Mathematics

1 answer:

Yakvenalex [24]3 years ago

6 0

Answer:

6.25 or 6 1/4

Step-by-step explanation:

You have to cross multiply:

x=y.

12*y=15*5.

12y=75.

y=75/12.

or 6.25

Hope this helps you :D

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Roberto is having his house painted. The job takes three days, and he pays the painter the same hourly rate

Tom [10]

Answer:

$\$60\ per\ hour$

Step-by-step explanation:

we know 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

Let

x -----> the number of hours worked

y ----> the amount paid in dollars

In this problem we have a proportional variation, between two variables, x, and y

<em>Find out the constant of proportionality k</em>

For (5,300) -----> $k=y/x$ ----> $k=300/5=60\ \$/h$

For (4,240) -----> $k=y/x$ ----> $k=240/4=60\ \$/h$

For (6,360) -----> $k=y/x$ ----> $k=360/6=60\ \$/h$

The constant k is

$k=60\ \$/h$

The equation is equal to

$y=60x$

The unit rate of change of dollars with respect to time is equal to the constant of proportionality or slope of the linear equation

therefore

$\$60\ per\ hour$

3 0

3 years ago

3(2x+4y) distributive property review just need an answer like 5c+15

frozen [14]

Answer:

6x + 12y

Step-by-step explanation:

Using distributive property means multiplying the number outside of the parentheses to each individual number within the parentheses:

3 × 2x = 6x

3 × 4y = 12y

Since there is an addition sign within the parentheses, we add these two numbers together. However, they are not like terms so their sum cannot actually be calculated

6x + 12y

7 0

3 years ago

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zalisa [80]

Answer:

choice D) d ≥ 5

Step-by-step explanation:

5 0

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An architectural drawing of a building shows the elevation of the basement floor to be â12 feet. the elevation of the roof is 32

vitfil [10]

<span>The total distance from the roof to the basement floor is 20 feet. If the elevation of the basement floor is 12 feet and the elevation of the roof is 32 feet, then you must subtract the elevation of the basement floor from the elevation of the roof to get the distance between them.</span>

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4 years ago

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Fed [463]

Answer:

x = 44

Step-by-step explanation:

$3x-6+x+2=180\\4x-4=180\\4x=176\\x=44$

6 0

3 years ago

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