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Mathematics 12 Online
OpenStudy (firechild17):

Help!! I will Fan and Medal!!!

OpenStudy (firechild17):

Part A: Max rented a motorbike at $465 for 5 days. If he rents the same motorbike for a week, he has to pay a total rent of $625. Write an equation in the standard form to represent the total rent (y) that Max has to pay for renting the motorbike for x days. (4 points) Part B: Write the equation obtained in Part A using function notation. (2 points) Part C: Describe the steps to graph the equation obtained above on the coordinate axes. Mention the labels on the axes and the intervals. (4 points)

OpenStudy (firechild17):

@tshimp0629 @TheMudkipFryAlt

OpenStudy (firechild17):

@AnsleyfaithEchols @jabez1777

OpenStudy (themudkipfryalt):

Im no good at these sort of things, sorry

OpenStudy (firechild17):

@3mar

OpenStudy (firechild17):

@563blackghost

OpenStudy (firechild17):

@ReneSiara

OpenStudy (firechild17):

@KamiBug

jigglypuff314 (jigglypuff314):

yeah ok I haven't helped people in ages, so forgive me if I explain things weird (feel free to ask if you get confused in any part of my explaining) there's this way to format equations called the y-intercept form it looks kinda like: y = mx + b you know that? :)

OpenStudy (3mar):

Could you give me 15 min, please?

OpenStudy (firechild17):

yes @3mar

jigglypuff314 (jigglypuff314):

yeah well the first step would be to plug in numbers where you can we can make 1 equation for the two different time lengths (time lengths); like 5 days and a "week" (7 days), are "x" and the total the person paid (465) and (625), are "y" we plug this in and get 465 = m*(5) + b and 625 = m*(7) + b @firechild17 do you see where I got that?

OpenStudy (firechild17):

yes @jigglypuff314 i know that formula and yes i see how you got that

jigglypuff314 (jigglypuff314):

awesome ^_^ using those two equations we want to solve for m and b

OpenStudy (firechild17):

okay and how do we do that again? @jigglypuff314

jigglypuff314 (jigglypuff314):

we can say 465 = m*(5) + b --> b = 465 - 5m and 625 = m*(7) + b --> b = 625 - 7m then since b = b 465 - 5m = 625 - 7m and we can solve for m

OpenStudy (firechild17):

okay

jigglypuff314 (jigglypuff314):

once we get a number for m we can plug it back into b = 465 - 5m to get b

OpenStudy (firechild17):

This doesnt make sense...I am still confused @jigglypuff314

jigglypuff314 (jigglypuff314):

alright, where did I lose yah? :D

jigglypuff314 (jigglypuff314):

we have two equations we know that because we are going to the same store, the (per day rate) and (flat rate) [(m) and (b)] are equal in other words, the (m) from the first equation should be equal to the (m) in the second equation; (same with the b) because of this, we can set the two equations equal to each other to find m and b

OpenStudy (firechild17):

I am horrible at math and truthfully when you started talking about finding B

jigglypuff314 (jigglypuff314):

yeah, I realized that I might have rushed through explaining that xD so it was my bad, sorry basically, we got two equations 465 = m*(5) + b and 625 = m*(7) + b right? then we want to find (m) and (b)

OpenStudy (firechild17):

yes we have to find M and B so we divide the first equation by 5 and the second one by 2?

jigglypuff314 (jigglypuff314):

hmm I don't think we have to multiply or divide anything I think we can solve for (b) first with just adding and subtracting easy stuff

OpenStudy (firechild17):

okay what do you mean?

jigglypuff314 (jigglypuff314):

well if we move everything to one side, for each equation for example, 465 = 5m + b [subtract 465 from both sides] -> 0 = 5m + b - 465 right?

OpenStudy (firechild17):

okay

jigglypuff314 (jigglypuff314):

then 625 = m*(7) + b becomes 0 = 7m + b - 625 right?

OpenStudy (firechild17):

yes

jigglypuff314 (jigglypuff314):

and 0 = 0 so we can set the equations equal to each other 5m + b - 465 = 7m + b - 625 right?

jigglypuff314 (jigglypuff314):

but then if we subtract both sides by b 5m + b - 465 = 7m + b - 625 - b - b --------------------------- we get 5m - 465 = 7m - 625 and now we can solve for m

OpenStudy (3mar):

@firechild17 Do you still need help? Sorry for being late for you! The electricity was off! @jigglypuff314 has walked with you very well! Thanks for him! If you still need help, I will not be late for you.

OpenStudy (firechild17):

@3mar i am still confused

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