i don't need to know how to solve it, but i just need the answers to these PLEASE!!

Question

1.) Ron has 18 coins with a total value of $2.85. The coins are dimes and quarters. How many of each coin does he have?

2.) A mixture of 6% disinfectant solution is to be made from 8% and 3% disinfectant solutions. How much of each solution should be used if 40 gallons of 6% solution are needed?

3.) How many gallons of 25% alcohol solution and 40% alcohol solution must be mixed to get 9 gallons of 30% alcohol solution?

4.) A mixture of 3% disinfectant solution is to be made from 6% and 2% disinfectant solutions. How much of each solution should be used if 28 gallons of 3% solution are needed?

Answer 1

1)  11 dimes,   7 quarters

2)  24 gal 8%, 16 gal 3%

3)  6 gal 25%, 3 gal 40%

4)  7 gal 6%,   21 gal 2%

 

I wonder why you don't want to know how to do them.....