A: 100 cm³
This is because the others can be multiplied by something 3 times to get it, but A can not.
What exactly do you need help with
Answer:

Can I have the brainliest please?
Answer:
The answer is 148.6666667
Step-by-step explanation:
1) Set a linear quation

2) Cross multiply

3) Multiple the right side

4) Divide both side by 15

5) Solve the linear equation

Answer:
a+2b
Step-by-step explanation:
2(a+2b)-a-2b
2a+4b-a-2b
=a+2b