Which graph of the polar equation r = 4 cos3 theta

Which equation can be simplified to find the inverse of y = 2x2?

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Find the zeros of each function. f(x) = x^2 + 5x - 6