Question

I need help with solving a few rational equations using word problem form. I need to know how to work out the problem to

Answer 1

Next one?

Answer 2

I still havent figured out the first one.

Answer 3

I don't mean to be wierd but do you by chance use yahoo or something cause this site keeps freezing and I am trying to finish my homework sooner rather than later.

Answer 4

I just need some tutoring

Answer 5

oh thank you

Answer 6

9mph/0.25 + y = 6mph / y
Cross multiply and get the time.

Answer 7

ok I'm feeling lost again

Answer 8

Well..You need to figure out what the time the daughter took..
Since the duaghter took
0.25 more hours than the dad

the equation would be 0.25 + y
y = How much hours the dad took

Understood till here?

Answer 9

somewhat

Answer 10

So if I write it like this 9/.25+6/x, then cross multiply would that give me the distance of the trail?

Answer 11

?

Answer 12

In a proportion, we put the relative standards next to each other.
So
mph mph
---- = -----
time time

Now plug it in

9mph 6mph
----- = ------
.25 + y y

and then cross multiply

Answer 13

ok

Answer 14

Did you solve for y? (NOTE: y = time dad took

Answer 15

I came out with .1666666666

Answer 16

Hmm I came out with 0.5
When you cross multiply, you get
9y = 6(.25 + y)
Distribute 6
9y = 1.5 + 6y
9y - 6y = 1.5
3y = 1.5
y = 0.5

Answer 17

My instructor showed me to do cross mulitply then divide

Answer 18

Hmm I am not familiar with that method..But my professor has taught me this way since I was in Middle School. =/

Answer 19

for this problem the book says to use rt=d formula

Answer 20

Yes we're getting to the point.

Answer 21

oh ok

Answer 22

Now since we have the dad's time which is 0.5, in order to find the daughters time, we must use the equation
y + 0.25

0.5 + 0.25 = .75
which is the daughters time.

Answer 23

O wait. Sorry. Its
0.5 - 0.25
Because daughter finished SOONER than her dad.

Answer 24

So the daughter's time is 0.25

Now Use the equation
RT = D
R is the rate which in the daughter's case is 9mph
T = 0.25
And Plug it in
0.25 ( 9) = D

Answer 25

The distance is 2.25 units.

Answer 26

Which in this case is miles ( as the rate used 'mph' or 'miles per hour' to express it)

Answer 27

Do you understand?

Answer 28

Kind of. I am looking back over what you wrote

Answer 29

Review through it thoroughly and repeatedly =) Its fairly simple if you break it down step by step.