1. 9/10 + 7/9 = 81/90 + 70/90 = 151/90 = 1 61/90
2. 1/2-3/11 = 11/22-6/22 = 5/22
3. 2/5-1/15 = 6/15-1/15 = 5/15 =1/3
Answer:
C
Step-by-step explanation:
I inserted 5 for a and c is the correct answer
The answer is B
Read on for explaination:
to find the mean of a set of numbers, you have to add them all together and divide by how many numbers you have.
Answer: B, E
Step-by-step explanation: