2. 4/6 , 6/9
3. 2/4 , 3/6
4. 8/10 , 12/15
5. =
6. >
7. >
8. =
9. =
10. <
11. =
12.
Answer:

Step-by-step explanation:

63 + 55 = 118
360- 118 = 242
ok so he is owing his sister 24 and he gives her 15
so 24-15=9
but as an addition expression it will be
x+15=24
x=24-15
x=9
The formula for a hemisphere is: 2/3 π r
if there was a problem to solve, i would be happy to do it.