Frank scored a total of 90 points on a two part quiz. His part 2 score was 9 less than twice his part 1 score. If x represents his part 1 score and y represents his part 2 score, then which system can be used to find Franks scores on each part?

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.

Multiply and simplify. 2x2y3z2 · 4xy4x2 how to do?