If a triangle abc is classified as a right triangle, which statement is true?   all three angles of triangle abc are congruent. two slopes of triangle abc are opposite reciprocals all three sides of triangle abc are congruent. two slopes of triangle abc are congruent.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?

What is the measure of each of the two angles formed by the bisector of the diagonal of a rhombus if the original angle measures 58 degrees?