8.) Sum: the product of two added factors
2 times: Multiplied by 2
The answer is

9.) We know Jack currently has $205. It says he spends $2 each day. This means that each day his current value changes by -$2.
This means your answer is

10.) If $55 is the total amount you are spending, then this means you put it on the right side of the equation:

Each book is $7.50, so you are buying b books.
Each pencil is $3, so you are buying p pencils.
Each eraser is $2, so you are buying e erasers.
This means that
