I can't really help you with the math but I can give you the formulas for the answers.
Step-by-step explanation:

Pyth. theorem

=18.33
=18.3 (corr. to the nearest tenth)
Answer:
you would need 18 tablespoons
Step-by-step explanation:
12--->72, so 3--->18
you are multiplying it by 6
Answer:
10
36
3
Step-by-step explanation:
g(-3)=7+3
4(-3)2
2.-3+9