CH 7 review

percent increase/decrease

100

A movie theater ticket costed $10. I got 50% off. How much did I play?

$5

200

Flowers for pookie were orginally $32. I got 25%. How much did I end up paying?

$24

300

Jeans on tik tok were $40. They increased the price by 30%. What will I pay after the increase in price?

$52

400

I paid $98 dollars for a plane ticket. It was originally $100. What PERCENT did I get off?

2%

500

Crumbl cookie costed $ 25 dollars. I had a discount and I paid $18.75 What percent did I get. off?

25%

proportional relationships

100

I grade 10 exams in 2 hours. I grade 5 exams in 1. Is this relationship proportional?

Yes. 

200

I go to action city. It costs 10 dollars to get in. Each arcade game I play costs $2. Is this relationship proportional?

No, I can walk in and walk out and still have to pay $2.

300

I go to action city. It costs 10 dollars to get in. Each arcade game I play costs $2. Write an algebraic expression to represent how much I will pay.

2x+10

400

Last week, I bought 1 pound of grapes for $7.50. This week I bought 3 pounds of grapes for $22.50 because they were so good. Is this relationship proportional?

Yes, unit rate of $7.50 and goes through (0,0)

500

I bought 3 pounds of grapes for $22.50 because they were so good. Write an equation to represent how much I pay per pound of grapes. 

7.50x= y

Combine like terms

100

3x + 3 + x

4x +3

200

2x + 3 + x -2

3x + 1

300

4x - 6x + 5

-2x + 5

400

5 - x - 7 + 3x

2x - 2

500

5x + x +7 - 9 - 10x + 2

-4x