Which step is not necessary when solving this system of equations by graphing

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x