I am not sure about b cut I think C is 10
Answer:
8/7 x 9/10 is 72/70
7/10 x 9/8 is 63/80
10/7 x 9/8 is 90/56
7/9 x 8/10 is 56/90
6.7-(-2.5)=9.2 6.7+(-2.5)=4.2 Neither
2.5 + 6.7 6.7 - 2.5 2.5 - 6.7
-2.5 + 6.7 -2.5 - 6.7
-6.7 + 2.5
3(x-4) = 15
Distribute the 3:
3x-12 = 15
Add 12 to both sides:
3x = 27
Divide both sides by 3:
X = 9
The answer is D. 9