Respuesta :

csterling60

Answer:49

Step-by-step explanation:

First we can do x^-2. Anything to a negative power is 1 over that power. 7^-2 is 1/49. Now, we have 1 divided by that. Using the Keep, Flip, Change rule in dividing fractions, we have 1*49. This equals 49. So, your final answer will be 49

Step-by-step explanation:

dmene2

Answer:

25

Step-by-step explanation:

(x + 1)(x + 2) x + 1

x+1+x+2+x+1

x+x+x+2+1+1

3x+4

when x=7

3(7)+4

21+4

25