A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Pump 1 takes 7minutes to fill my 20 gallon gas tank. Pump 2 takes 13 minutes to fill my tank. How long would it take if I could use both tanks at the same time?
anonymous
 5 years ago
Pump 1 takes 7minutes to fill my 20 gallon gas tank. Pump 2 takes 13 minutes to fill my tank. How long would it take if I could use both tanks at the same time?

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[\frac{20}{7}x + \frac{20}{13}x = 20\] add fractions 7*13 = 91 \[\frac{(20)(13)x + (20)(7)x}{91} = 20\] multiply 91 on both sides add like terms \[400x = 1820\] \[x = 4.55\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok i understand the answer but not understanding the directions plz make them clearer

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0for pump 1 we need to find the rate of gall/min >20/7 pump 2 rate is 20/13 gal/min if we multiply this rate by time we get a num of gallons this time is represented by x, the amount of time to fill up using both pumps total num of gallons needed is 20 so it equals 20

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i just have to explain in detail how i got my answer and show my work just alittle confused on your work
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.