Solve the system of equations by substitution. Show the steps that correspond with the substitution method. y = -2x - 5

5x - 2y = 19

5x - 2(-2x - 5) = 19

5x + 4x +10 = 19

9x + 10 = 19

9x = 9

x = 1

y = -2(1) - 5

y = -2 - 5

y = -7

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step-by-step explanation:

the dimensions are:

step-by-step explanation:

we want to find the dimensions of a rectangular box with volume of

we factor to obtain;

we rewrite the rightmost factor to obtain;

recall that:

we apply difference of two squares formula to obtain;

hence the dimensions are