Holy Spirit high school is selling tickets to its spring concert. Adult tickets cost 4$ and student tickets cost 2.50 . 900 tickets are sold and the school makes 2820$ write a system of linear equations to represent this situation

Explain how you can use the triangle sum theorem to find the measures of the angles in an equilateral triangle. the angles of an equilateral triangle are . let the measure of each angle be x. then, by the triangle sum theorem, x + x + x = 3x = ° solving for x gives x = °

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Find the value of x for which the lines are parallel.