Algebra practice question

Answer: -11 or −11

5 = 3k − 7 gives k = 4, so g(x) = 4x − 7 and g(−1) = −4 − 7 = −11.

Common wrong answers

If you answered 4

4 is k, not g(−1).

If you answered 11

11 has the wrong sign.

If you answered -3

−3 comes from k = 4 but computing 4 − 7 (using x = 1 instead of −1).

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