A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Dirk can clean a playground in 5 hours. Geralyn can clean a playground in only 4 hours.
Which of the following can be used to determine the amount of time it would take for Dirk and Geralyn to clean a playground together?
a. 1 over 5 plus 1 over x equals 1 over 4
b. 1 over x plus 1 over 4 equals 1 over 5
c. 1 over 5 plus 1 over 4 equals 1 over x
d. 1 over 4 plus 1 over 5 equals x over 9
anonymous
 one year ago
Dirk can clean a playground in 5 hours. Geralyn can clean a playground in only 4 hours. Which of the following can be used to determine the amount of time it would take for Dirk and Geralyn to clean a playground together? a. 1 over 5 plus 1 over x equals 1 over 4 b. 1 over x plus 1 over 4 equals 1 over 5 c. 1 over 5 plus 1 over 4 equals 1 over x d. 1 over 4 plus 1 over 5 equals x over 9

This Question is Closed

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2Hint: x = time it takes Dirk to do the job alone y = time it takes Geralyn to do the job alone z = time it takes for them to do the job working together \[\Large \frac{1}{x}+\frac{1}{y}=\frac{1}{z}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@jim_thompson5910 thank you so so much!

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.2you're welcome
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.