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Determine k so that the point (−1, k) is a solution of y = −5x+ 3.

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Question:

A
k = 8

explanation

Substitute (x, y) = (−1, k) into the equation y = −5x+ 3.

Original equation.

y = −5x+ 3

Substitute: −1 for x, k for y.

k = −5(−1) + 3

Multiply: −5(−1) = 5.

k = 5 + 3

Add: 5 + 3 = 8.

k = 8

Thus, k = 8.

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