Answer:
do you mean height, because then the answer would be a length of 9 and height of 6
Step-by-step explanation:
9+9=18
6+6=12
18+12=30
Answer: 
Step-by-step explanation:

a=2
b=-9
c=5





Answer:
a) Josh likely made the negative and positive multiplication error.
b) -20a-8+12b
= -4(5a+2-3b)
Step-by-step explanation:
To check if you are correct, you can always simplify it again:
-4(5a+2-3b)
=-20a-8+12b
Remember:
Negative times negative equals to positive, negative times positive equals to negative!
I hope this is helpful! :)
Answer:
hmmm 38
Step-by-step explanation:
?
answer for this question is 2/19