Question

Think about a kayaking race, a round trip airplane flight, a shopper on an escalator, or a swimming competition.

Choose an activity where a rational expression can represent the total or difference of time. For example, what is the time to go round trip on a hot air balloon ride?

Use full sentences to describe the real world situation. Write the addition or subtraction rational expression to represent your situation. Simplify the expression, showing all the work or explaining the steps using complete sentences.

Answer 1

please help, i don't undeerstand this

Answer 2

Suppose you are in a swimming competition and the competition is for 5 laps. How is that?

Answer 3

i dont understand how to make the problem

Answer 4

OK, I'll explain you:)

Answer 5

okay thank you:)

Answer 6

just 2 minutes

Answer 7

alrighty. :)

Answer 8

Thanks for waiting

Answer 9

Suppose I'm in a swimming competition. The competition consists of 5 laps.
The competition began sometime back, and I've completed 2 laps.
So how much of the race I've completed.

Answer 10

no problem, your helping me.

Answer 11

how would you put that into a math problem though?

Answer 12

Out of 5 laps, I've completed 2 laps
so I've completed \(\large \frac{2}{5}\)th of the race.

Answer 13

Now I'm in the middle of the competition and I need to know how much more race is remaining.
The full competition consists of 5 laps, so
\[\frac{5}{5}=1\]
I've completed \(\large\frac25\)th of the race, so
\[\text{Competition remaining}=1-\frac25=\frac35\]
SO \(\huge \frac35\)th race is remaining

Answer 14

Did you understand how we saw a real life situation from a Mathematical view?

Answer 15

I understand that, but in the lessom the problems are like this...
Ex. \[4\over x-7 + 1\over x-3\]

Answer 16

Let me think, how we could get like that

Answer 17

Okay. Thank you.

Answer 18

I'm here, thinking:)

Answer 19

Okay:)

Answer 20

Supposedly I've completed x laps!!! and I know 1/5 th race is remaining, so
With x laps, fraction of race completed
\[\frac x5\]
\[\text{Full Race corresponds to }1\]
so
\[1-\frac x5= \frac15\]
This can be used to evaluate the no. of laps completed in the competition:D