3 years ago

Solve 4r2 – 5 = 59 {± 3} {± 4} {± 5} {±6}

Mathematics

1 answer:

Alisiya [41]3 years ago

7 0

9514 1404 393

Answer:

(b) ±4

Step-by-step explanation:

4r^2 -5 = 59 . . . . given

4r^2 = 64 . . . . . . . add 5

r^2 = 16 . . . . . . . . . divide by 4

r = ±4 . . . . . . . . . . . take the square root

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