Help please ?

- anonymous

Help please ?

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- anonymous

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- anonymous

@ganeshie8 I only have 4 more questions ! D:

- ganeshie8

good :)

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## More answers

- anonymous

Yay so you're willing to help ? :)

- ganeshie8

yes why not for a brilliant student like u, its easy to explain :)

- anonymous

Great ! Thank you so so much ! You have no idea how much I appreciate it :)

- ganeshie8

ok, so Juliana has $24 in her pocket. and she wants to knw how many text messages she can send

- anonymous

Right

- ganeshie8

she knows that \(f(x) = (3x+2)/4 \) gives the cost, when u put number of messages x into the equation

- ganeshie8

for example, if u have texted 10 messages cost wud be :-
f(10 ) = (3(10)+2)/4
= 32/4
= 8
so it wil cost u $8 just to text 10 msgs... pretty costly !!

- anonymous

Okay makes sense !

- ganeshie8

but thats not wat we want,
here our task is to find a function, into which we can plugin the MONEY we have, and it should tell us how many TEXTS we can message

- anonymous

I tried working it out and got 18.5 ..

- ganeshie8

right ?

- anonymous

I think I'm getting ahead of myself here haha i apologize

- anonymous

And yes , right :)

- ganeshie8

its okay, but 18.5 messages for $24 doesnt look correct

- ganeshie8

let me show u how to do this step by step

- anonymous

Please and thank you !

- ganeshie8

given equaiton :-
\(y = f(x) = (3x+2)/4 \)
here, x is number of texts, y is dollars

- ganeshie8

since you wanto know how many texts u can send, you need to solve x above.

- ganeshie8

\(y = (3x+2)/4\)
solve x

- anonymous

How would I start off ?

- ganeshie8

multiply 4 both sides

- anonymous

4(3x+2) ?

- ganeshie8

\(y = (3x+2)/4\)
multiply 4 both sides
\(4y = 3x+2\)

- ganeshie8

next, subtract 2 both sides

- ganeshie8

\(y=(3x+2)/4 \)
multiply 4 both sides
\(4y=3x+2\)
subtract 2 both sides
\(4y-2 = 3x\)
divide 3 both sides
\(\large \frac{4y-2}{3} = x\)

- ganeshie8

now, replace x and y (just do it, il tell you later why :))

- ganeshie8

replace x & y
\(\large \frac{4x-2}{3} = y \)
\(\large y = \frac{4x-2}{3} \)

- anonymous

Isn't it to put the equation in the correct form ?

- ganeshie8

thats the required function, where u need to plugin x=$24, and it gives u number of text messages u can send !

- ganeshie8

exactly ! you're right, we replace x and y, to put the function in right form :)

- anonymous

Yay :D

- ganeshie8

put x = 24, and see how many messages she can send

- anonymous

Wait so that's the answer ?

- ganeshie8

yes thats the required function ! since the question wants u to explain, explain wat we did so far :)

- ganeshie8

btw, for $24, she can send :-
\(\large y = \frac{4x-2}{3}\)
\(\large y = \frac{4(24)-2}{3}\)
\(=33\)

- ganeshie8

sorry, that should be 31, so she can send 31 messages

- anonymous

So with $24 she can send 33 text messages ?

- ganeshie8

*31

- anonymous

Oh okay :) So everything we just worked through is the answer basically ? Because it says to put in complete sentences

- ganeshie8

yes ! ima hav dinner... brb :)

- anonymous

Haha okay !

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