Emma spent 4 hours reviewing his tests. she spent ¾ of the time studying for a social studies test. How many hours did she spend on social studies?

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

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

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?