Write an equation for the translation, y=|x|, 4 units up

Prove that quadrilateral is a rhombus.

What is the gcf of 20c^3-5c^4+30c^6

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?