For what value of a does 9 = (StartFraction 1 Over 27 EndFraction) Superscript a + 3?
A. Negative eleven-thirds
B. Negative seven-thirds
C. Seven-thirds
D. Eleven-thirds

A

Step-by-step explanation:

9 = (1/27)^(a+3)

3² = (3^-3)^(a+3)

3² = 3^(-3a-9)

2 = -3a-9

-3a = 11

a = -11/3

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9