at a music store, CDs are sold at $5 each and DVDs are sold at $7 each. If one day it sold 10 more CDs than DVDs and make a total of $530 how many CDs and DVDs did it sell respectively?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

What is the equation of a line passing through (-6,5) and having a slope of 1/3

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.