Answer:
Step-by-step explanation:
If you factor the expression 7a+21 you can get:
7 × (a+3)
This are similar answers to your questions.
Answer:

Step-by-step explanation:
What if i say NO?
jk
3*3=9
8+3=11
12-3=9
sp
9*11=99
2 area coverd so far
99+9=108
7*2=14
108+14=122
Lastly the tir
10-7=3
11-3-2=6
6*4=24
24/2=12

Oh gosh i wish i knew how to do that what grade are u in cause i remember having that last year but dont remember.