Y + x = 12 y -x = 8 are thes equation perpendicular or parallel

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)