Surface area = 2(6*3) + 2(6*2) + 2*(2*3) = 36+24+12 = 72 cm^2
Let

, where

and let

be any real constant.
Given this definition of scalar multiplication, we can see right away that there is no identity element

such that

because
The answer is 48 degrees because you add 42 and 90 and then subtract from 180 (total degrees of a triangle)
Answer:X=30 so A=65
Step-by-step explanation: