Circle 1, circle 2 and circle 3 have the same center, and have a radius r1
(1) a2=a3

(2) a2+a3 = 2 a1

Question 5 spring semester final exam math evaluate

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day