Answer:
Monica used 7( 9 + 4 ) as the equivalent expression
Step-by-step explanation:
First off we have to know what 63 + 28 is, that question equals to a sum of 91.
Then, if you use the 7( 9 + 4 ) expression, you multiply 7 to both 9 and 4.
7 x 9 = 63
7 x 4 = 28
Lastly, if you add those two numbers you got you will get the answer of 91.
Therefore, 7( 9 + 4 ) is the answer to the expression.
