SOLUTION: Elaine started the season running a 7-minute mile and is reducing her time by 5 secondsa week. Mark started with a 9-minute mile and is cutting his time by 515 seconds a week. What
Algebra.Com
Question 361764: Elaine started the season running a 7-minute mile and is reducing her time by 5 secondsa week. Mark started with a 9-minute mile and is cutting his time by 515 seconds a week. What equation describes Elaine's time in weeks. What single equation expresses the time when the two runners are running a mile at the same pace? Please help to solve?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Elaine started the season running a 7-minute mile and is reducing her time by 5 seconds a week.
-----
E(x) = 420 - 5x where x is number of weeks
---------------------------
Mark started with a 9-minute mile and is cutting his time by 515 seconds a week.
----
I assume that 515 you posted is wrong. Maybe you meant 51.5. If so
M(x) = 540 - 51.5x where x is number of weeks.
----
What equation describes Elaine's time in weeks. What single equation expresses the time when the two runners are running a mile at the same pace?
420-5x = 540-51.5x
===============================
Cheers,
Stan H.
RELATED QUESTIONS
Brittany can run a mile in 6 minutes and Christina can run a mile in 9 minutes. If both... (answered by stanbon,richwmiller)
Peter and John started running a 2-mile course at 1:15 p.m. Peter finished at 1:30 p.m.... (answered by Fombitz)
Janene and Emily plan to go on a marathon training run. Emily arrives late, so Janene... (answered by ankor@dixie-net.com)
kevin started running the first week in januray. He ran 4 miles 3 days a week. Greg... (answered by ankor@dixie-net.com)
Nancy started the year with $435 in the bank and is saving $25 a week. Shane started... (answered by advanced_Learner)
Please help me with this word problem:
A criminal stole a watch from a store and... (answered by xinxin)
Traci is running a trail in Henna Park. She can run one mile in 10 minutes. Yoni is... (answered by addingup)
kim started with $4 and saved $2 a week. write an equation the growth of her savings... (answered by Alan3354)
In order to collect a salary bonus, baseball player Tony Jones must get at least 220... (answered by ewatrrr)