You know a1.
So find a2, a3, and so on until a7.
a(1) = 12
a(2) = 16
a(3) = 20
a(4) = 24
a(5) = 28
a(6) = 32
a(7) = 36
Each is 4 more than the previous.
-5x 2/7 =
−10x/7
srry if it is wrong man but that is what i got
Answer:
15/40
Step-by-step explanation:

Answer:
Just plug in 10^2-7.5^2
To get 43.75
Step-by-step explanation:
I hope you figure this out.