Answer:
5.
4 + 2(-7 - (5 - 15))
= 4 + 2(-7 - (-10))
= 4 + 2(-7 + 10)
= 4 + 2(3)
= 4 + 6
= 10
6.
((6 - 5)^8 - 1)/(-5(-2) - 4)
= (1^8 - 1)/(10 - 4)
= (1 - 1)/6
= 0/6
= 0
7.
(14² - 8²)/(-3(8 - 3²))
= (196 - 64)/(-3(8 - 9))
= (196 - 64)/(-24 + 27)
= 132/3
= 44
Let the length of one of the shorter pieces be

. Then, we know that two of the pieces are that length, and the third piece is

. Since these are all pieces of a rope, all we need to do to figure out the lengths is add all those together, solve for

, and then plug that back in to the desired lengths:



Shorter pieces:

Longer piece:
<em>these do not equal the same. </em>
step by step: 3x + 4 (2x + 5)
multiply 4 by 2x, which is 8, then multiply 4 by 5, which is 20.
simplify; 3x + 8x + 20
combine like terms; (3x + 8x) + (20)
you’ll come up with 11x + 20
step by step: 6x + 5x
just add the two together and... bam, you get 11x.
Nice that's coool that's great
4.5 I'm pretty sure I hope I was right and hope this helps