Answer:
120 students don't have social media accounts
Step-by-step explanation:
Whether the sample is representative:
Estimate:
Hope this helps
The slope is 8/2. You subtract 8 from 0 and 4 from 2 and the -8 is on top of -2, and because both numbers are negatives you change them to positive values.
If John charge $12 then he has 14 students, and he gets $ 14*12,
If he increases on $2(12+2) , he loses 1 student (14-1), gets (12+2)*(14-1)
if he increases on he loses 2 students (14-2) gets (12+2*2)(14-2)
2+2 (12+2*2)
if he increases 2*3 he loses 3 students, (14-3) gets (12+2*3)(14-3)
2x*3 (12+2*3)
and so on......
if he increases 2*x, he loses x students, (14-x)left, gets (12+2x)(14-x)
(12+2x)
So , his revenue in general =
(12+2x)(14-x)=12*14-12x+28x-2x²=-2x²+16x+168
<em> I think it should look like this
</em>c(x)= -2x²+16x+168
A=2B
B=B
C=A-2=2B-2
A+B+C=98
5B-2=98
5B=100
B=20
Thus A= 2B = 40
C=38
Nothing much wrong only calculation mistakes