There are 4 different US coins...
One is a quarter, which equals to 25c.
One is a dime, which equals to 10c.
One is a nickel which equals to 5c.
And the last one is a penny which equals to 1c.
You have two coins that equal 30c.
You can't use a dime, so you must use 2 quarters, 2 dimes, 2 pennies, a quarter and a penny, a quarter and a dime, or a dime and a penny.
2 quarters = 50c.
2 dimes = 20c.
2 pennies = 2c.
a quarter and a penny = 26c.
a quarter and a dime = 35c.
and a dime and a penny = 11.
So it's kinda impossible for two US coins (other than a nickel) to equal 30c.
Good luck though!
.
