Step-by-step explanation:

He will need 48×2=96 brownies so 96÷16= 6 packages of brownie mix
Total cost = a + (13a/100)
<u>Step-by-step explanation:</u>
Let the price of the monster truck be 'a'
He should pay 13% tax
Total cost = price of the truck + tax
Total cost = a + (13a/100)
The equation to represent the total cost is
Total cost= a + (13a/100)
-32/40 + -35/40 = -32+-35/40
= -67/40
= -1.675
The answer would then be -1.675.
Since it's 10 to the 2nd power, you just move the decimal places 2 places to the right.
So the answer is 3460