What is the solution to the system of equations?
5x-3y=-9
2x-5y=4

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Solve this 364x-64x=300x and 12(x2–x–1)+13(x2–x–1)=25(x2–x–1)

Find the root(s) of f (x) = (x- 6)2(x + 2)2.