36. What is the sum of the following integers (-12 + (+15+ (-18?
a. 12 b. -13 c. -14 d. 14
37. what is the sum of two negative number?
39.what is the difference of number sentence
(&14)-8-(12)?
a-10 b.8 c.+10 d.-9
40.what is the value of (-15)-17-(20)?
a. 14 b. 13 c.-12 d.-11​