Answer:
B. 84
(85+89+90+82+x)/5=86
so x=84
The answer is B
Step-by-step explanation:
yes, i think it is correct :)
Δ =
VΔ = 4 * 8 = 32
a = (- 4 ± 32) *
a' = 7/2
a''= 9/2
5x + 12 = 12x + 5
-7x + 12 = 5
-7x = -7
x = 1
one solution
its either -7 or 7 but im not super confidant in that answer but thats what makes sense to me
