A family celebrates each birthday of quintuplet children with individual birthday cakes. So, every year each of 5 cakes is decorated with the
number of candles that represents the quintuplets’ age. Fresh candles are
used every year. How many candles are used in 21 years?

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

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

How to do this , and can some one explain