Suppose a video store charges nonmembers $4 to rent each video. A store membership costs $21 and members pay only $2.50 to rent each video. For what number of videos is the cost the same?

14 videos

Step-by-step explanation:

Let x is the number of videos, y is the total cost

Suppose a video store charges nonmembers $4 to rent each video

so, y₁ = 4x   ⇒(1)

If a store membership costs $21 and members pay only $2.50 to rent each video.

So, y₂ = 2.5x + 21   ⇒(2)

For the same cost :

∴ y₁ = y₂

4x = 2.5x + 21   ⇒ combine like terms

4x - 2.5x = 21

1.5x = 21

x =

The number of videos at which the cost is the same 14 videos

answer:

sometimes

*i think

step-by-step explanation:

1. the cylinder is a. 54

2.   a.108 /