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Mathematics 19 Online
OpenStudy (anonymous):

I need help please! 5. Roses-R-Red has offered to sell its roses for a fixed down payment of $20 and an additional charge of 75 cents per stem. How many roses can you buy from Roses-R-Red for $65.00?

OpenStudy (anonymous):

it sounds like a function problem to me o,o

OpenStudy (anonymous):

It is. I know that the function is 20+.75r, but I don't know how I would get the answer to this. :(

OpenStudy (anonymous):

you set it equal to 65 65=20+.75r

OpenStudy (jdoe0001):

75cents = $0.75 or 3/4 of a dollar \( { \begin{array}{llll} stem&price&down\ payment \\\hline\\ x&y \\\hline\\ 1&0.75(1)&+20\\ 2&0.75(2)&+20\\ 3&0.75(3)&+20\\ 4&0.75(4)&+20\\ 5&0.75(5)&+20\\ ...&0.75(....)&+20\\ \end{array}\implies \begin{array}{llll} price=0.75stem+20\\ y=0.75x+20\\ \hline\\ \textit{if you only have }\$65\quad y=65 \\ \quad \\ 65=0.75x+20 \end{array} }\) solve for "x", to see how many "stems" you can get

OpenStudy (jdoe0001):

y = 65 is another way of saying "your price" is 65

OpenStudy (anonymous):

Ok I will try to solve this real quick..

OpenStudy (anonymous):

I got 44.25

OpenStudy (anonymous):

@e.mccormick Can you help?

OpenStudy (anonymous):

@jdoe0001 Did I do this right?

OpenStudy (jdoe0001):

hmmm retry \(\bf 65= 0.75x + 20\)

OpenStudy (e.mccormick):

I think they will give an even answer, not fractional. What did you do to start solving it?

OpenStudy (anonymous):

Oh I see what I did wrong. I added the .75 instead of dividing it. I got 60 roses. Is that correct?

OpenStudy (e.mccormick):

Yah, that looks a lot better.

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