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Nutka1998 [239]

3 years ago

11

on a remote controlled racing track, car a completes a lap every 15 seconds and car B compeletes a lap every 12 seconds. if they

both start side by side at the starting time how many seconds will it take them to be side by side again?

1 answer:

Sidana [21]3 years ago

6 0

I may not help. But i believe it is something to do with the lowest common multiple between those 2 being 60

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

goldfiish [28.3K]

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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Step-by-step explanation:

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