Heres some free points but what did I do wrong, Its reveiw so its not that important but still?

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.

Use the quadratic formula to solve 5x=6x^2-3,what are the values of x?

Which graph shows a function with a range of all real numbers greater than or equal to -1