Answer:
3a - 21
Step-by-step explanation:
3 ( a - 7 )
= 3 ( a ) + 3 ( - 7 )
= 3a - 21
Distribute the 3 to all the terms in the parentheses. So, the simplif expression is 3a-21.
:)
This is just simple subtraction, 59.99 - 47.50
The answer is C: 12.49