What is 20 % of 21.00 dollars.

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)