Did i do these problems correctly?

1. 39*(-43)= -1677

I multiply 39 and -43 and the answer was -1677

2. Find absolute value of |-7| and the answer is 7.
It is the opposite of what it is.

3. Add. -24 + (-17)
The answer is -41. They both are negative so you just add them together and keep the negative sign.