Barrett and Penelope have some quarters for the vending machine.  The number of quarters Barrett has can be represented by x  The number of quarters Penelope has is double the number of quarters Barrett has  The total number of quarters they have is 60 What is x, the number of quarters Barrett has? A. 20
C. 30
B. 10
D. 40

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove