1. Which number is the resolution of m + 90 = 150?

a. 50
b. 60 (my answer)
c. 140
d. 240

2. Which number is the solution of n/3 = -12?

a. -36
b. -4 (my answer)
c. 4
d 36

3. Use mental math to find the solution of 19b = 190.

a. 10
b. 11
c. 171 (my answer)
d. 208

4. Estimate the solution of y + 1.8 = 3.18 to the nearest whole number.

a. 0
b. 1
c. 2
d. 5 (my answer)

3 answers

#1 ok
#2 you have solved 3n = -12
#3 You have solved b/9 = 19
#4 You have solved y-1.8 = 3.18

Did you not check your answers to see whether they actually worked?
1. B
2. A
3.A
4. B

Are the correct answers. 100%

To help with questions like 2 and 3, try using the calculator symbolab. It has helped me out big time.
planet baab