Peter is making new cushion covers for a chair. There are three sizes of cushions on the chair. What is the surface area of the seat back cushion?
21 in
Net for Seat Back
3 in
3 in
10 in
21 in
21 in
3 in
seat back
15 in
10 in arm rest
15 in
15 in
3 in
seat bottom
3 in
21 in
18 in
21 in

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!

2425

step-by-step explanation:

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2