The answer is 3
Multiply 6 by 3 to get the total amount of money for the books then minus the answer 18 which you get from 6 x 3 = 18
Then minus 18 from 21 to get $3
21 - 18 = 3
the volume of the box is L x W x H so it should be 7x5x4=140
Answer:
I think it's 1,728 millimeters ^3
<h2>4</h2>
Subtract 9 and multiply by 2
