Answer:
a = 23 degrees (brainliest?)
Explanation:
<em>supplementary line </em>is <u>180 degrees</u>
180 - 157 = 23
The answer is 38, because if you take away the 15 he bought afterwards (34-15) you get 19, and then since he sold half his collection you would double that (19×2) and that's 38.
Answer:

Step-by-step explanation:
So we have the equation:

To solve, subtract 5 from both sides. This is the subtraction property of equality:

The left side cancels:

Subtract on the right.

So, our answer is -7.
1012 divided by 120 is 8.43 so 9 boxes will be needed