Algebra-2

If z varies jointly with x and y, we can write the equation as:

z = k * x * y

where k is the constant of variation.

To find the value of k, we can substitute the given values of x, y, and z into the equation:

-14 = k * 7 * 3

Simplifying:

-14 = 21k

Dividing both sides by 21:
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