Evauate 15 divide by r minus 1 when r = 5

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

Sanjay solved the equation below. which property did he use to determine that 7x+42=42 is equivalent to 7(x+6)=42 7x+42=42 7x=0 x=0

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)