Saturday

February 28, 2015

February 28, 2015

Posted by **mandy** on Friday, December 2, 2011 at 2:47pm.

Alex? mph

Beth? mph

- math -
**Steve**, Friday, December 2, 2011 at 3:30pm2.2/(a+b) = 1

2.2/(a-b) = 11

That is, the time to cover 2.2 miles with their combined speeds is 1 hur

Alex overtakes Beth at a speed of a-b, and takes 11 hours to cover the extra 2.2 miles.

rearrange things a bit to get

a + b = 2.2

11a - 11b = 2.2

or,

11a + 11b = 24.2

11a - 11b = 2.2

22b = 22

b = 1

a = 1.2

Beth walks at 1 mph

Alex walks at 1.2 mph

**Answer this Question**

**Related Questions**

math - beth walks 2 blocks in 15 minutes . how many blocks would beth walk if ...

Language Arts HELP! - Which of the following sentences contains a verb in the ...

L/A - Which of the following sentences contains a verb future perfect tense? A: ...

algebra - Teri, nick, and Alex had $865 altogether. Teri spent 2/5 of her money...

math - Felicity is deep-sea diving with two friends. Todd is exploring a coral ...

Math - Tierra,nico, and alex had 856.00 together. Tierra spent 2/5 of her money,...

Algebra - To attend a family reunion, Beth drives 100 mi from Fresno and Clara ...

Solving Rational Equations - To attend a family reunion, Beth drives 100 mi ...

math !!!! :O - Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of ...

Algebra - 1) Two cars leave town at the same time going in opposite directions. ...