Question

You have q quarters, d dimes, and n nickels in a piggy bank. How would you write an expression for the total value of coins in dollars?

Answer 1

`1/4q + 1/10d + 1/20n`

Explanation:

If you had one quarter, it would be worth `25` cents, or `0.25` dollars.

`0.25 = 1/4` (that's why it's called one quarter)

Similarly, one dime is worth `10` cents, or `1/10` of a dollar,

and a nickel is worth `5` cents, which is `1/20` of a dollar,

all because a dollar is worth `100` cents.