kimmagallanes13 kimmagallanes13

23-05-2021
Mathematics

contestada

Solve: 5|x + 9| = 80
A. x = -25 or x = 9
B. x = -25 or x = 7
C. x = -7 or x = 25
D. x = 7 or x = 16

Respuesta :

jimthompson5910 jimthompson5910

23-05-2021

Answer: Choice B

x = -25 or x = 7

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Work Shown:

5|x+9| = 80

|x+9| = 80/5

|x+9| = 16

x+9 = 16 or x+9 = -16

x = 16-9 or x = -16-9

x = 7 or x = -25

x = -25 or x = 7

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