Answer:
For 7a its C i think And for 7b is 3:2
Step-by-step explanation:
hope this helps
Answer:
a=20
Step-by-step explanation:
You cross multiply: 9a=180
a=20.
I believe the answer is 3240^9/2 g^33/8
Answer:
A. 
Step-by-step explanation:
Each mark represent 0.1 unit, so if you count from 0 to 
you get 0.5 that is exactly the same that (for convention the left of the 0 is taken as negative and the right as positive).
