It is called a scale factor :)
⇒ x³y⁴ × x⁵y³
⇒ x³⁺⁵y⁴⁺³
⇒ x⁸y⁷
In short, Your Answer would be x⁸y⁷
Hope this helps!
<h3>
Hey!</h3>
<em><u>To solve the missing number of the original amount of gallons that were in the tank is simply by adding the two numbers we have: </u></em>
<em><u></u></em>
9+3= 12 gallons
<u><em>To make sure 12 was the original number, subtract 12 from 9. </em></u>
<u><em /></u>
<u><em>12-9= 3 gallons </em></u>
So your answer to your question is 12 gallons!
Hope this helped! °ω°