What is the surface area of the square pyramid

105 in²

Step-by-step explanation:

The base's area is 5 * 5, so it is 25 in².

The sides' area is 4(1/2 * 5 * 8) (because it is four sides), so it is 80 in².

Adding those two gives us 105 in².

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.