Simplify each expression.
--5(- 10)
36x2
O 4x+ 36x2
-5x+ 50
9x +36x2

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

Given f(t) = 282 - 53 +1, determine the function value f(2). do not include f(z) = in your answer

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?