The ratio of money in Brian's wallet to Colin's wallet one day was 7:2. Brian spent £39 that day.

Brian now had £4 less than Colin.

How much did they initially have altogether?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

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

How many zeros does the function f(x)=4x3-x2+1 have