Which statement must be true to prove that a quadrilateral is a parallelogram? a) consecutive angles are acute. b) opposite angles are complementary. c) consecutive angles are complementary. d) opposite angles are congruent.

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x.which term can she add to the polynomial that would not change its grestest common factor? check all that apply

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?