Some one

which is the difference of 21 1/4- 18 2/4

Answer question above and explain each step : )

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?