alexandra finds that she can give 3 haircuts and 2 hair dyes in 315 minutes. giving 2 haircuts and 4 hair dyes takes 450 minutes. which system of equations represent the situation?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

What is the x-intercept and y-intercept of the equation 2x+1. 2o

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?