zahra compares two wireless data plans which equation gives the correct value of n
the number of gb for which plans a and b cost the same
(g8 means 'gigabytes of data)
wireless plan a
no initiate fee and 8$ for each gb
wireless plan b
$20 for the
first 2 gb
$6 for each
additional gb
after the first 2
a) 8n = 20 + 60
b) 8n= 20(2n) + 6
c) 8n = 20 + 6(n-2)
d) 8n = 20 + 2n+6

8n=20+6(n-2)

Step-by-step explanation:

n is the number of GB

Plan A has no initial fee and charges 8$ per each GB

So A has an equation that is y=0+8n or just y=8n.

Plan B has 20 for the first 2 GB and $6 for each addition GB after the first 2.

So B has an equation  that is y=0+20+6(n-2) assuming n is 2 are greater.

So the two equations are y=8n and y=20+6(n-2).

We want Plan A to be the same as Plan B.

So we need to solve:

8n=20+6(n-2).

Let's check our equation:

Distribute:

8n=20+6n-12

Subtract 6n on both sides:

2n=20-12

2n=8

Divide both sides by 2:

n=4

Plan A charges 8 dollars ber GB, so plan A charges 4(8)=32 dollars.

Plan B charges 20 dollars for the first 2GB and 6 dollars for each GB after so we used 4 which means we are spending 20+6(2)=20+12=32 dollars.

They are the amount so n=4 is right.