In a class, 45 students are taking the sat exam. the number of boys is 9 more than the number of girls. how many girls and boys are in the classroom?
write a system of equations and solve using any method.

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

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x