The <em><u>correct answer</u></em> is:
a) 25q + 10d + 5n + 60 = 187
Explanation:
One dollar and 87 cents can be written as 1.87. However, since one dollar is equal to 100 cents, we can also write this as 187 cents.
Each quarter, represented by q, is equal to 25 cents; this gives us the expression 25q.
Each dime, represented by d, is equal to 10 cents; this gives us the expression 10d.
Each nickel, represented by n, is equal to 5 cents; this gives us the expression 5n.
We have 60 pennies.
This gives us the equation 25q+10d+5n+60=187.