Question

Does anyone know the answer to number 4?

Answer 1

You have 12 quarters and 30 dimes.

Explanation:

If you have an equation that says 10d+25q= 600 cents (d meaning dime and q meaning quarter) and have another equation that says d+w=42, then you could use those two equations to solve the problem.

Hope this helps a little bit. It is a little hard to explain but let me know if you need some more help.

Answer 2

12 quarters = $3
30 dimes = $3
That adds up to $6