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Mathematics 17 Online
OpenStudy (sydthekid913):

If f(x) = 5x and https://media.education2020.com/evresources/2003-08-03-00-00_files/i0180000.jpg find https://media.education2020.com/evresources/2003-08-03-00-00_files/i0180001.jpg P.S. sorry I couldn't copy the problem directly in the text box. It wouldn't accept the format. Thank you. SydtheKid913

jimthompson5910 (jim_thompson5910):

\[\Large f(x) = 5x\] \[\Large g(x) = \frac{5x}{3}\]

jimthompson5910 (jim_thompson5910):

\[\Large f(x) \div g(x) = (5x) \div \frac{5x}{3}\] \[\Large f(x) \div g(x) = \frac{5x}{1} \div \frac{5x}{3}\] How do we divide fractions?

OpenStudy (sydthekid913):

well it would be 1/3 right?

jimthompson5910 (jim_thompson5910):

not quite

OpenStudy (sydthekid913):

ummmmmmmmmmm

OpenStudy (sydthekid913):

how do I divide variables?

jimthompson5910 (jim_thompson5910):

remember when you divide fractions, you flip the second fraction and multiply

jimthompson5910 (jim_thompson5910):

So, \[\Large f(x) \div g(x) = \frac{5x}{1} \div \frac{5x}{3}\] \[\Large f(x) \div g(x) = \frac{5x}{1} \times \frac{3}{5x}\]

jimthompson5910 (jim_thompson5910):

Then you multiply straight across and reduce

OpenStudy (sydthekid913):

O so I is 15x/5x? Which is equal to 3?

jimthompson5910 (jim_thompson5910):

yep \[\Large f(x) \div g(x) = \frac{5x}{1} \div \frac{5x}{3}\] \[\Large f(x) \div g(x) = \frac{5x}{1} \times \frac{3}{5x}\] \[\Large f(x) \div g(x) = \frac{\cancel{5x}}{1} \times \frac{3}{\cancel{5x}}\] \[\Large f(x) \div g(x) = \frac{1}{1} \times \frac{3}{1}\] \[\Large f(x) \div g(x) = \frac{1 \times 3}{1 \times 1}\] \[\Large f(x) \div g(x) = \frac{3}{1}\] \[\Large f(x) \div g(x) = 3\]

OpenStudy (sydthekid913):

can I fan you?

jimthompson5910 (jim_thompson5910):

sure if you want

OpenStudy (sydthekid913):

cool!!! thank you sooooooooooo much!!!

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