Ask your own question, for FREE!
Mathematics 57 Online
OpenStudy (anonymous):

Need HElp MedAllS!!!!!

OpenStudy (anonymous):

two bikers left at the same time traveling opposite directions. The first biker was traveling 15 mph. The second biker was traveling 20mph. How long before they are 140 miles apart?

OpenStudy (anonymous):

any day?

OpenStudy (abb0t):

Lol.

OpenStudy (mathstudent55):

The first biker travels distance d1 at speed s1 in t1 time. The second biker travels distance d2 at speed s2 in t2 time. In general, s = d/t, so d = st d1 = s1*t1, and d2 = s2*t2 d1 + d2 = s1*t1 + s2*t2 For them to be 140 miles apart means that the sum of their distances, d1 + d2 is 140 miles, or d1 + d2 = 140. Also, they travel the same amount of time, so you want t1 = t2 = t. You want d1 + d2 = 140, and t1 = t2 = t, so you have 140 = 15t + 20t 35t = 140 t = 4 4 hours

OpenStudy (anonymous):

|dw:1363059098511:dw| For the first biker, we have: \[x_1=v_1t+x_0\] And second biker: \[x_2=v_2t+x_{0}\] From the drawing we also have: \[x_1-x_2=140\] Now, in the above equation, replace x_1 and x_2 with their respective formula: \[(v_1t+x_0)-(v_2t+x_{0})=140\] Plug in the value's of v_1(15), v_2(20) and x_0(0) and you have t: the time in which the two bikers are 140 miles apart!

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
heavenly: Dm me if you wanna vc
48 seconds ago 4 Replies 0 Medals
Gucchi: programming help
38 minutes ago 9 Replies 0 Medals
Gucchi: programming help
1 hour ago 10 Replies 1 Medal
walmartshopper: 11. Which slave was the leader of the revolt?
4 hours ago 4 Replies 1 Medal
walmartshopper: HELP! PLEASE!
4 hours ago 11 Replies 2 Medals
TheAzula: Who did you guys vote for?
2 hours ago 36 Replies 7 Medals
TheAzula: Has anybody read the book "island of the blue dolphins"?
3 hours ago 12 Replies 0 Medals
rose12345: hellp needed
6 hours ago 4 Replies 1 Medal
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!