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now cross multiply and get the connection between y (number of people) and t (seconds)

and hey .. how are you ? :)

\[t=.72p\]

|dw:1350566721091:dw|

if you multiply one side by 100 you should multiply the other by 100 too

we need to isolate t from the equation that i gave you

no .. it's final answer is correct
but i want you to be able to get it by yourself

there is no 75 in decart's answer :|

yes sorry i was washing dishes lol

division of two fractions
is like multiplying the first by the reciprocal of the second

\[\frac{ a }{ b } \div \frac{ c }{ d } = \frac{ a }{ b } \times \frac{ d }{ c }\]

so you can rewrite the problem as .. ?

no i just gave an example

you have to multiply the first fraction by the reciprocal of the second..

|dw:1350568226013:dw|

yes .. and changed the division to multiplication
this his how you divide two fractions..

\[\frac{ (x^2-x-6)(x^2+5x+4) }{ (x^2-2x-3)(x^2+x-12) }\]

\[\frac{ a }{ b } \neq a * b\]

we changed the division to multiplication because we divided FRACTION BY FRACTION

no it's not right

\[\frac{ 5 }{ 3 } * \frac{ 4 }{ 2 } = ?\]

solve this please

right you just multiplied 5 with 4
and divided by the multiplication of 3 with 2

|dw:1350569102823:dw|

you tell me .. how do we multiply those two fractions ?

i dont know why you multiply numerator by denominator

yes as i wrote up there

can you factor the rest of the terms ?

yes.. i just showed the way

you see my last expression is (x+2)(x-3)

now factor the rest of the terms .. what do you get ?

so are you factoring the rest ?

good so how the expression looks like ?

after you change every term by it's factored form

very good

now you can eliminate some of them..

if you have the same thing in the numerator and in the denominator
you can eliminate it ..

and one more ..

|dw:1350571449666:dw|

so what is left .. \[\frac{ x+2 }{ x-3 }\]

yes

yw :)

i hope the next question of this kind will be easier for you
now that you know the steps

Im happy i could help you

:)