Find an equation of variation in which y varies jointly as x and z and inversely as the product of w and p, where yequalsstartfraction 7 over 28 endfraction when xequals7, zequals4, wequals7, and pequals8.

To solve this problem you must apply the proccedure shown below:

1. You have that varies jointly as and and inversely as the product of and . Therefore, you can write the following equation, where is the constant of proportionality:

2. Now, you must solve for the constant of proportionality, as following:

3. Susbtiute values:

4. Substitute the value of the constant of proportionality into the equation:

The answer is:

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.

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