Solve the following expressions using the number line and your knowledge of integers.
9. -1 +5= 4
10. 5+ (-3) =
11. 6 - (-2) =
12. -8-8-
13. 15+ 8 =
14. 0-(-2) =
15. -5- (-2) =

pls help I do not under stand...

The weekly revenue for a company is r = 3p^2 + 60p + 1060, where p is the price of the company's product. what price will result in a revenue of $1200.

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?