PLS HELP GIVING 100 PTS I NEED IT FOR ASSIGNMENT PLS PLS HELP I GIVE BRANLIEST TOO!!!

For each sentence below, find the value of x that makes each sentence true. (515) 5 = 25* x= (813)2 = 4* x=

Why is x= 4 a solution to the proportion 14/x 56/1 6

3questions show how you solved the problem 1. subtract & simplify (–y2 – 4y – 8) – (–4y2 – 6y + 3) 2.multiply and simplify 2x2y3z2 · 4xy4x2 3.multiply and simplify (x – 4) (x2 – 5x – 6)