Answer:
Brad's mom baked 120 brownies
Step-by-step explanation:
In the problem it states Brad's mom baked twice as Greg and Vinnie's moms combined.
So first we'll find how much Greg's mom made, she made 24.
Now Vinnie's mom made 36.
Combined that's 60.
And then twice as many just means multiplied by 2 which is 120.
Here's the equation: (24+36)2
I hope this helps you!!