Question

Roma drove 270 mi from her hometown to the city. During her return trip, she was able to increase her speed by 9 mph. If her return trip took 1 hr less time, find her original speed.

Answer 1

that's 2430

Answer 2

pleeease hellp!! :)

Answer 3

never mind use a equation d=rt

Answer 4

distance= rate times time

Answer 5

so the distance is 270 right?

Answer 6

yes

Answer 7

i found out that the orig. and return distances are 270, the orig. rate is x, the return rate is x+9, the orig. time is 120/x and the return time is 120/x+6 i just don't know what to do w/ the numbers

Answer 8

pleasee heelllpp!!! i only have 1 more try on my homework haha

Answer 9

Let s = speed to the city
then
(s+9) = speed home
:
Write a time equation, time = dist/speed
:
To city time - return time = 1 hr less

Answer 10

Multiply by s(s+9), results:
270(s+9) - 270s = 1s(s+9)
:

Answer 11

270s +2430 - 270s= 1s(s+9)

Answer 12

i got s^2+9s-2430=0

Answer 13

you must distribute 270 to 9 and s

Answer 14

i did but then I did like terms

Answer 15

here use this link it show the exact question but with different numbers it should guide you:

http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.472436.html

Answer 16

thanks

Answer 17

tell me what you get ok?

Answer 18

i got 45 mph :)

Answer 19

im soo sorry i have to go im heading to a wedding!

Answer 20

its okay thanks so much!