Can someone do this problem im getting a weird answer? ? #12

Strawberries cause two hours per pound kate buys 5 pounds he gets 20% off discount on the total cost how much does kate pay for the strawberries

Find the roots of the equation below. x^2 - 6 + 9 = 0

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.