Remove grouping signs −25+(32−18)+[−3(23−15)+5(10−12)] plz, how is it done? step by step

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?

Find the volume of the solid bounded by the plane z=0 and the paraboloid z=1-x^2 –y^2

Match the one-to-one functions with their inverse functions.