Ryan's 3 guestions?

1. -3a(4a+8b)+5(8a+5b-10)

2. A number that is multiplied by six, but shared equally with four people.

3. (4x)(5y)-9x(7x-8y) x=5,y=2



The Answer


1.
-3a(4a+8b)+5(8a+5b-10)
-12a^2-24ab + 40a+25b-50

Answer
-12a^2+40a-24ab+25b-50


2.
A number that is multiplied by six, but shared equally with four people.

Answer
6(n)/4


3.
(4x)(5y)-9x(7x-8y) x=5,y=2
20xy-45x^2+72xy

20(5)(2)-45(5)^2+72(5)(2)
20(5)(2)-45(25)+72(5)(2)
20(10)-45(25)+72(5)(2)
20(10)-45(25)+72(10)
200-45(25)+72(10)
200-1125+72(10)
200-1125+720
= -205

Answer
-205

A faster way of doing it

20(5)(2)-45(5)^2+72(5)(2)
20(10)-45(25)+72(10)
200-1125+720
= -205