Answer:
12
Step-by-step explanation:
4y - 2x
= 4(7) - 2(8)
= 28 - 16
= 12
The answer is 81. since (-3)^2 is 9. Therefore, 9x9=81.
Answer:
y=27x
Step-by-step explanation:
first you have to do 3x9 to get the answer witch is 27 so then it wants an eqation so the eqation would be y=27x
The subtraction sign in front of the second set of parenthesis changes the signs on the terms inside those parenthesis. So this could be rewritten as

. None of the exponents on the x are the same, so we will just express it in terms of descending powers of x.

. This is also the same as

if you don't like to start with a negative. Either one is correct.
Your answer is point g and h