Answer:
$78.75
Explanation:
So we know that After 2 Dogs walked, Irene makes $10.50, so we divide that by 2 (Since he walked 2 dogs) to find out how much walking one dog makes him.
10.50/2=5.25
5.25 x 15= 78.75 (We multiply by 15 because that's how many dogs are needed to find the total money.)