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barxatty [35]
3 years ago
11

Solve 3^x−5 = 9. (3 points) Select one: a. x = −3 b. x = 2 c. x = 7 d. x = 8

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
4 0
ANSWER

C. x=7

EXPLANATION

The given exponential equation is

{3}^{x - 5} = 9

We rewrite the right hand side as 3 raised to exponent 2.

{3}^{x - 5} = {3}^{2}

Observe that the base of both sides of the equation are equal.

We now equate the exponents.

x - 5 = 2

Solve for x,

x = 2 + 5

x = 7

The correct choice is C.
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