Respuesta :

MathPhys

Step-by-step explanation:

For each problem, plug in the values, then simplify.

g(x) = x² − 8x + 21

g(-5) = (-5)² − 8(-5) + 21

g(-5) = 25 + 40 + 21

g(-5) = 86

g(x) = x² − 8x + 21

g(x+4) = (x+4)² − 8(x+4) + 21

g(x+4) = x² + 8x + 16 − 8x − 32 + 21

g(x+4) = x² + 5

f(x) = -4x + 1

53 = -4x + 1

52 = -4x

x = -13

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