Zach has $9.50 and plans to purchase songs from Itunes. Each song he wants to purchase is $1.25. He needs to make sure he has $5.75 left over for the app he wants to buy. Write and solve an inequality to see how many songs Zach can buy

Let the number of songs, he wants to purchase = x

And each song cost him $1.25, so cost of x songs=1.25x.

And he wants to buy an app, whose price is $ 5.75.

And the total amount, Zach has = $ 9.50

So the inequality is

1.25x+5.75<=9.50

Subtracting 5.75 to both sides

1.25x<=3.75

Dividing both sides by 3

x<=3

So Zach can buy less then or equal to 3 songs.