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RSB [31]
3 years ago
7

Solve the proportion 4/5=28/x using two different methods. explain each method

Mathematics
1 answer:
katrin [286]3 years ago
8 0
4x=28x5
4x=140
4x=35

or you can use the horizontal method

4=28
5=x

you know that 4x7=28
so you obviously know that 5x7 has to give you x which is 35
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Find an equation of variation in which y varies jointly as x and z and inversely as the product of w and p,
pentagon [3]

The equation of variation in which y varies jointly as x and z and inversely as the product of w and p is y=0.5(xz/wp).

Given that variable y varies jointly as x and z and inversely as the product of w and p,where y=7/28 where x=7,z=4,w=7 and p=8.

We are required to find the equation of variation.

To solve this problem we must apply the following procedure:

1) We have that y varies jointly as x and z and inversely as the product of w and p. Therefore we can write the following equation,where k is the constant of proportionality:

y=k(xz/wp)----------1

Now we have to solve for the constant of proportionality as done under:

k=ywp/xz-------------2

Using the values in equation 1.

k=(7/28)(7)(8)/(7)(4)

=0.5

Using all the values in the equation 2.

y=0.5(xz/wp)

Hence the equation of variance is y=0.5(xz/wp).

Question is incomplete.The following values should be included:

y=7/28 where x=7,z=4,w=7 and p=8.

Learn more about equation at brainly.com/question/2972832

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2 years ago
What is the amount of snow that can be placed in this globe if it is 4.7 inches wide?
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Step-by-step explanation:

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(-36)/(-8)=36/8=4.5

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