# algebra

each week, mandy's algebra teacher gives a 10 point math quiz. after 5 weeks, mandy has earned a total of 36 points for an average of 7.2 points per quiz. she would like to raise her average to 9 points. on how many quizzes must she score 10 points in order to reach her goal?

1. 👍 0
2. 👎 0
3. 👁 129
1. guess and check is the best way!

total is 5 quizzes and she has 36 points so 7.2*5 (weeks) = 36 and add 10 to 36, 14 times so just add 140 and you get 176/19(#number of weeks 14+5) and you get 9.2 as the average. hope this is what you were looking for. sorry if its not

1. 👍 0
2. 👎 0
posted by sara

## Similar Questions

1. ### Algebra

Mandy has to pay for her gas when she goes out with friends. She receives an allowance of \$25 per week. Mandy fills her 16 gallon car up twice a month with gas currently costing \$2.11 per gallon. After filling her car up twice a

asked by Anonymous on September 17, 2016
2. ### math

distance from A-B is 40 km.Mandy starts from A at 11 am and Jason starts from B at 1 pm.He walks at 5 km/h and gets to A at the same time as Mandy gets to B.How fast did Mandy walk?

asked by wan on October 20, 2012

I really need help with this one question on my math pretests and I have no idea what to do! The question is: Mandy begins bicycling west at 30 miles per hour at 11:00 am. If Liz leaves from the same point 20 minutes later

asked by ANNA on September 14, 2014
4. ### Math

Mandy had three Maths tests and her mean mark is 84.What is the total of Mandy's marks for the three test?

asked by Luisa on May 17, 2018
5. ### Physics

Mandy picks up a 25 N book from the floor to a height of 0.50m. How much work does Mandy do? (Hint use w=mg to find the force necessary to move the book)

asked by Jennifer Tran on April 8, 2013
6. ### Math

Mandy scores b points in a basketball game. Jay scores 3 points less than Mandy. Kareem scores 2 times as many points as Mandy. Find the number of points that Jay scores in terms of b.

asked by Sam on February 20, 2014
7. ### Algebra

I have 2 questions in math that I am not quite sure about... 1. Mandy begins bicycling west at 30 mph at 11 A.M. If Liz leaves from the same point 20 min. later bicycling west at 36 miles per hour, when will she catch Mandy? 2. A

asked by Becca on December 7, 2009
8. ### Algebra

I have 2 questions in math that I am not quite sure about... 1. Mandy begins bicycling west at 30 mph at 11 A.M. If Liz leaves from the same point 20 min. later bicycling west at 36 miles per hour, when will she catch Mandy? 2. A

asked by Becca on December 7, 2009
9. ### English

Hey, just look up the grammar, tenses and wheter I use the right words, ok? It is for an oral excercise so the spelling isen't important. Thanks and now the text: Mandy: Good Morning and welcome to the morning show with me: Mandy

asked by Julie on July 11, 2013
10. ### math

22. The graph shows the number of handbags that Mandy made in one day. What are the variables? Describe how the variables are related at various points on the graph. Mandy's Handbags

asked by Anonymous on January 8, 2013

More Similar Questions