Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. What is the output of the function fx) = x + 21 if the input is 4?
When the input is 4. the output of Ax) = x + 21 is

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

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