FIRST ONE TO GET IT GETS THE CROWN THING! (idk. I'm so tired and this is my last question for math and my teacher never taught us how to do this. Plz help!) Combine like terms: -5y²+5-4-4y²+5y²-4x³-1

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount