A community for students.
Here's the question you clicked on:
 0 viewing
sarahlikewoe
 2 years ago
9. Lisa can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?
12 mph
6 mph
15 mph
18 mph
sarahlikewoe
 2 years ago
9. Lisa can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike? 12 mph 6 mph 15 mph 18 mph

This Question is Closed

Outkast3r09
 2 years ago
Best ResponseYou've already chosen the best response.0let \[v_c=v+12\] \[v_b=v\]

Coolsector
 2 years ago
Best ResponseYou've already chosen the best response.1let v be her "normal" velocity and s be the distance to work s = v * (2/3) s = (v+12) * (1/3) divide the equations and get (v+12) = 2v v = 12

Outkast3r09
 2 years ago
Best ResponseYou've already chosen the best response.0if \[V=\frac{d}{t}\] \[v*t=d\]

Outkast3r09
 2 years ago
Best ResponseYou've already chosen the best response.0since distances are the same \[v*\frac{2}{3}=(v+12)\frac{1}{3}\] \[\frac{2}{3}v=\frac{1}{3}v+4\] \[\frac{1}{3}v=4\] \[v=12\]
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.