X+y=8 solve for y. what is that answer

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.