Question

How to write the expression of the cost of a movie ticket which $8.50 plus $4 for pop corn and drink?

Answer 1

`m = 12.50xx x`

Explanation:

The formula for 1 movie ticket is:
`m = 8.50 + 4`
`m = 12.50`

The formula for 2 movie tickets would be:
`m = (8.50 + 4) xx color(blue)2`
`m = 12.50 xx color(blue)2`
`m = 25`

The formula for 3 movie tickets would be:
`m = (8.50 + 4) xx color(blue)3`
`m = 12.50 xx color(blue)3`
`m = 37.50`

So you can see a pattern here. Whenever we increase the number of tickets by one, we increase the number we're multiplying by one. Essentially, we multiply by the number of tickets.

This would make the equation:
`m = 12.50 xx x`

Where `x = "number of tickets"`.