Answer:
Question 5 is B
Because after I simplified I got B and its the only one that makes sense.
Answer:
In standard form it is x^4 - 12x^3y + 54x^2y^2 - 108x y^3 + 81y^4.
Step-by-step explanation:
(3y)^4 + 4C1(3y)^3(-x) + 4C2(3y)^2(-x)^2 + 4C3(3y)(-x)^3 + (-x)^4
= 81y^4 - 108y^3x + 54y^2x^2 - 12yx^3 + x^4
Answer:

Step-by-step explanation:
Divide both sides by the numeric factor on the left side, then solve.

Answer: 12.96
Step-by-step explanation: 20% is it's discount, so 80% you still need to pay. So, you multiply .80*7.20 to get 5.76. Then you add 5.76+7.20 which is 12.96.
At the start of 2nd day, he completed 4 chairs....at the end of the day, (9 hrs later) he completed 7 chairs....that means he had completed (7-4) = 3 chairs in 9 hrs. 9/3 = 3...that means it takes 3 hrs to complete 1 chair.
He has 7....so he needs 3 more chairs...and if 1 chair takes 3 hrs, then 3 chairs takes (3 * 3) = 9 hrs <===