Use x and y intercepts to graph the equation. use the graph to find the number of childrens tickets purchased if 20 adult tickets were purchased

Question and answers are in the attached picture. you so much in advance.

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.