Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
ivettef365
Group Title
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
 11 months ago
 11 months ago
ivettef365 Group Title
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
 11 months ago
 11 months ago

This Question is Closed

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
\[\frac{6\times 4}{6+4}\] is a start
 11 months ago

phanta_seea Group TitleBest ResponseYou've already chosen the best response.0
how did you get the formula satellite?
 11 months ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
if you do two of these you will see it
 11 months ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
one has a rate of \(\frac{1}{6}\) the other a rate of \(\frac{1}{4}\) the combined rate is the sum \(\frac{1}{6}+\frac{1}{4}=\frac{4+6}{6\times 4}\) you want to solve rate times time equals one job, i.e. \[\frac{4+6}{6\times 4}t=1\] so \[t=\frac{6\times 4}{4+6}\]
 11 months ago

ivettef365 Group TitleBest ResponseYou've already chosen the best response.0
thanks
 11 months ago

satellite73 Group TitleBest ResponseYou've already chosen the best response.2
you can work it out step by step for each problem and get the same answer, but if you have to do more than one of these, say adam eats an apple if m minutes, eve eats an apple in n minutes, together they can eat the apple in \[\frac{m\times n}{m+n}\] minutes saves time , especially on a test or quiz
 11 months ago
See more questions >>>
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.