Question

Mr. Bolden bought g guppies and paid with a $20dollar bill. write an algebraic expression to represent how much change Mr. Bolden got back. guppies are $3 each

Answer 1

Let:

C = Change

B = Budget of Mr Bolden

a = Price of each guppy

g = Number of guppies

so:

$\begin{gathered} C=B-ag \\ where \\ B=20 \\ a=3 \\ so\colon \\ C=20-3g \end{gathered}$