It is currently 23 Sep 2020, 20:19
My Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

The total amount of Judy’s water bill for the last quarter

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 13352
Followers: 288

Kudos [?]: 3383 [1] , given: 12186

CAT Tests
The total amount of Judy’s water bill for the last quarter [#permalink] New post 06 Mar 2018, 15:21
1
This post received
KUDOS
Expert's post
00:00

Question Stats:

93% (00:55) correct 6% (02:01) wrong based on 32 sessions
The total amount of Judy’s water bill for the last quarter of the year was $40.50. The bill consisted of a fixed charge of $13.50 plus a charge of $0.0075 per gallon for the water used in the quarter. For how many gallons of water was Judy charged for the quarter?

enter your value

[Reveal] Spoiler: OA
3600


kudos to the right explanation and solution
_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

1 KUDOS received
Sherpa Prep Representative
User avatar
Joined: 15 Jan 2018
Posts: 147
GMAT 1: Q V
Followers: 7

Kudos [?]: 240 [1] , given: 0

Re: The total amount of Judy’s water bill for the last quarter [#permalink] New post 06 Mar 2018, 19:07
1
This post received
KUDOS
Expert's post
We can make an equation to figure out the answer. This is a quite common equation with a flat fee and a rate above that. The equation will be the same as the line slope formula: y = mx + b.

In this case, we can say the equation is

Total = (price per gallon)(# of gallons) + flat fee

so

40.50 = .0075g + 13.50 (where g is # of gallons)

then

27 = .0075g

then

27/.0075 = g

cancel 3 from top and bottom:

9/.0025 = g

Multiply top and bottom by 4 to make the decimal easy:

36/.01

multiply top and bottom by 100:

3,600 = g

So Judy used 3,600 gallons.
_________________

-
-
-
-
-

Need help with GRE math? Check out our ground-breaking books and app.

1 KUDOS received
GRE Instructor
User avatar
Joined: 10 Apr 2015
Posts: 3831
Followers: 148

Kudos [?]: 4484 [1] , given: 69

CAT Tests
Re: The total amount of Judy’s water bill for the last quarter [#permalink] New post 03 May 2018, 10:05
1
This post received
KUDOS
Expert's post
Carcass wrote:
The total amount of Judy’s water bill for the last quarter of the year was $40.50. The bill consisted of a fixed charge of $13.50 plus a charge of $0.0075 per gallon for the water used in the quarter. For how many gallons of water was Judy charged for the quarter?

enter your value

[Reveal] Spoiler: OA
3600


kudos to the right explanation and solution



The bill consisted of a fixed charge of $13.50 plus a charge of $0.0075 per gallon for the water used in the quarter.
Let G = number of gallons Judy used

So, we can write: TOTAL BILL = $13.50 + ($0.0075)(G)

Judy was charged $40.50, so we can write: $40.50 = $13.50 + ($0.0075)(G)
Subtract $13.50 from both sides to get: $27 = ($0.0075)(G)
Solve: G = 27/0.0075 = 3600

Answer: 3600

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com
If you enjoy my solutions, you'll like my GRE prep course.
Image
Sign up for GRE Question of the Day emails

Re: The total amount of Judy’s water bill for the last quarter   [#permalink] 03 May 2018, 10:05
Display posts from previous: Sort by

The total amount of Judy’s water bill for the last quarter

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.