donut problem | Mathematics | Page 1

native mortar Oct 12, 2023, 1:48 AM

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wooden grottoBOT Oct 12, 2023, 1:48 AM

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void girder Oct 12, 2023, 1:51 AM

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which part r u confuse at?

native mortar Oct 12, 2023, 1:51 AM

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Just the first equation part

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It’s more of a clarifying question

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So I know I have (5,1.15)

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And (11,2.35)

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But what equation would I use for those points

void girder Oct 12, 2023, 1:55 AM

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i think what they meant is like 5 dounuts it cost =1.15

native mortar Oct 12, 2023, 1:56 AM

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That’s the answer for a?

void girder Oct 12, 2023, 1:57 AM

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wait

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let me read it correctly first

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so there is 5d =1.15p

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and another equation of 11d =2.35 p

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and since they want you to express price in terms of number of donuts

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so u need to make p as the subject of the formula

native mortar Oct 12, 2023, 1:59 AM

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Ok

void girder Oct 12, 2023, 1:59 AM

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if i were to understand tht correctly?

native mortar Oct 12, 2023, 1:59 AM

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So it’ll be a fraction

void girder Oct 12, 2023, 1:59 AM

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most probably

void girder Oct 12, 2023, 2:00 AM

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native mortar And (11,2.35)

oh wait wait waiit

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can i ask

native mortar Oct 12, 2023, 2:00 AM

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How would I go abt finding that?

native mortar Oct 12, 2023, 2:00 AM

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void girder can i ask

I know what your asking

void girder Oct 12, 2023, 2:00 AM

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did u teacher perhaps teach u tht way?

native mortar Oct 12, 2023, 2:01 AM

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No, I just thought it would be a point

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But then remembered they want me to put it in terms of donuts

void girder Oct 12, 2023, 2:01 AM

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native mortar And (11,2.35)

i mean it is possible

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to do it this way

native mortar Oct 12, 2023, 2:01 AM

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Wait

void girder Oct 12, 2023, 2:02 AM

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so u have the 2 coordinates u can find the gradient from here

native mortar Oct 12, 2023, 2:02 AM

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Can I just write it as d=16+3.5?

void girder Oct 12, 2023, 2:02 AM

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no

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i think lets do it ur way

native mortar Oct 12, 2023, 2:02 AM

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Ok

void girder Oct 12, 2023, 2:02 AM

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i think thts more logical

void girder Oct 12, 2023, 2:03 AM

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native mortar And (11,2.35)

u have the 2 coordinates right

native mortar Oct 12, 2023, 2:03 AM

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Yes

void girder Oct 12, 2023, 2:03 AM

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can u find the gradient from there?

native mortar Oct 12, 2023, 2:04 AM

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The difference in the two coordinates?

void girder Oct 12, 2023, 2:04 AM

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do you knwo the formula for gradient of 2 points

native mortar Oct 12, 2023, 2:05 AM

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Oh oh

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Give me a minute

void girder Oct 12, 2023, 2:05 AM

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take ur timem

native mortar Oct 12, 2023, 2:05 AM

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I’ll take a picture so it’s easier

void girder Oct 12, 2023, 2:05 AM

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ok

native mortar Oct 12, 2023, 2:07 AM

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@void girder

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void girder Oct 12, 2023, 2:07 AM

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yes correct

native mortar Oct 12, 2023, 2:07 AM

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So what do I do w the 1/5

void girder Oct 12, 2023, 2:07 AM

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your y axis is the price, x axis is the number of donuts right

native mortar Oct 12, 2023, 2:07 AM

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Oh ok

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So

void girder Oct 12, 2023, 2:08 AM

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ok how do u ussually make equation of a slope

native mortar Oct 12, 2023, 2:08 AM

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uhhh

void girder Oct 12, 2023, 2:09 AM

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?

native mortar Oct 12, 2023, 2:09 AM

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Rise over run

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So the 1 is rise

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Aka y

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1p=5d

void girder Oct 12, 2023, 2:09 AM

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no need

native mortar Oct 12, 2023, 2:10 AM

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Wdym?

void girder Oct 12, 2023, 2:10 AM

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do uk (y1-y2)=m(x1-x2)

native mortar Oct 12, 2023, 2:10 AM

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Yes

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Point slope form

void girder Oct 12, 2023, 2:10 AM

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but in this senario ur y will be p since its the price

native mortar Oct 12, 2023, 2:11 AM

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Ok

void girder Oct 12, 2023, 2:11 AM

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and x is d since its the number of donuts

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then make the equation from there

native mortar Oct 12, 2023, 2:12 AM

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($1.15-$2.35)=1/5(5-11)

clear violetBOT Oct 12, 2023, 2:12 AM

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GhostPepper

void girder Oct 12, 2023, 2:12 AM

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sorry wrong type

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do uk (y-y1)=m(x-x1)

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should be this

native mortar Oct 12, 2023, 2:13 AM

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Same thing

void girder Oct 12, 2023, 2:13 AM

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no

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it will be y-1.15=1/5(x-5)

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u will do it like this

native mortar Oct 12, 2023, 2:13 AM

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Ohh

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So that’s the answer for a?

void girder Oct 12, 2023, 2:14 AM

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its the same way on how u did in this ques of no 1

native mortar Oct 12, 2023, 2:15 AM

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Ok

native mortar Oct 12, 2023, 2:15 AM

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native mortar So that’s the answer for a?

^?

void girder Oct 12, 2023, 2:16 AM

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i got p=1/5d +0.15

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can u und this ?

native mortar Oct 12, 2023, 2:16 AM

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Oh right

void girder Oct 12, 2023, 2:16 AM

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und?

native mortar Oct 12, 2023, 2:17 AM

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Und?

void girder Oct 12, 2023, 2:17 AM

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understand?

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lazy tipe fully

native mortar Oct 12, 2023, 2:17 AM

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Yes

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Sorry lmao

void girder Oct 12, 2023, 2:18 AM

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lol ok

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with the equation of part a u should be able to do part b

native mortar Oct 12, 2023, 2:19 AM

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I got p=.21

void girder Oct 12, 2023, 2:19 AM

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i got smth different

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oh ik alr

native mortar Oct 12, 2023, 2:20 AM

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Am I wrong?

void girder Oct 12, 2023, 2:20 AM

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native mortar I got p=.21

did u do 1/5d istead ot (1/5)d

native mortar Oct 12, 2023, 2:20 AM

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Yeah

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No

void girder Oct 12, 2023, 2:20 AM

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yes or no?

native mortar Oct 12, 2023, 2:20 AM

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I did (1/5)3

void girder Oct 12, 2023, 2:21 AM

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ok then u should get 0.75

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how did u get 0.21

native mortar Oct 12, 2023, 2:21 AM

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1/5 times 3 is .6

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Am I wrong?

void girder Oct 12, 2023, 2:24 AM

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yes

native mortar Oct 12, 2023, 2:24 AM

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Hmm

void girder Oct 12, 2023, 2:24 AM

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then u need to add 0.15

native mortar Oct 12, 2023, 2:24 AM

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I’m confused

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So you got .60?

void girder Oct 12, 2023, 2:24 AM

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void girder i got p=1/5d +0.15

u sub in to the value here right

native mortar Oct 12, 2023, 2:24 AM

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Yeah I know

void girder Oct 12, 2023, 2:24 AM

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so u got p=1.5(3)+0.15

native mortar Oct 12, 2023, 2:25 AM

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It’s 1/5 though

void girder Oct 12, 2023, 2:25 AM

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native mortar It’s 1/5 though

wdym

native mortar Oct 12, 2023, 2:25 AM

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I’m asking, is 1/5 times 3 .60?

void girder Oct 12, 2023, 2:25 AM

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oooh ya

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sorry

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typo

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so u got p=1/5(3)+0.15

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ull get 0.75

native mortar Oct 12, 2023, 2:25 AM

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Which is .75?

void girder Oct 12, 2023, 2:26 AM

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ye

native mortar Oct 12, 2023, 2:26 AM

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Ok

void girder Oct 12, 2023, 2:26 AM

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u should be able to do th rest

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with the equation alr

native mortar Oct 12, 2023, 2:27 AM

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😭😭

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What am I doing wrong?

void girder Oct 12, 2023, 2:27 AM

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yes

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u forgoto to add 0.15

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which will give u 0.75

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is this for part b?

native mortar Oct 12, 2023, 2:27 AM

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OHHHH

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lmaooo

void girder Oct 12, 2023, 2:27 AM

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ha

native mortar Oct 12, 2023, 2:28 AM

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My dumb ass thought .6+.15 was .21

void girder Oct 12, 2023, 2:28 AM

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lol no worries

native mortar Oct 12, 2023, 2:29 AM

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C would be 12.6?

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I did

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.75 divided by 3.15

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Got 4.2

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Then times 3 is 12.6

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@void girder

void girder Oct 12, 2023, 2:34 AM

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wait

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i got different

native mortar Oct 12, 2023, 2:35 AM

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Wait

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It would be 15 donurs

void girder Oct 12, 2023, 2:35 AM

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yesh

native mortar Oct 12, 2023, 2:35 AM

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3.15=2d+.15

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Then subtract .15 from both sides

void girder Oct 12, 2023, 2:36 AM

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ya

native mortar Oct 12, 2023, 2:36 AM

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3.00=2d

void girder Oct 12, 2023, 2:36 AM

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native mortar 3.15=2d+.15

shouldnt it be .2d

native mortar Oct 12, 2023, 2:37 AM

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Yes

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Sorry

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So then the graph

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Let me show you what I have

void girder Oct 12, 2023, 2:39 AM

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ok

native mortar Oct 12, 2023, 2:41 AM

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The points would be

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(3,.75)

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(5,1.15)

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(11,2.35)

void girder Oct 12, 2023, 2:43 AM

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yes

native mortar Oct 12, 2023, 2:43 AM

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and one thing

void girder Oct 12, 2023, 2:43 AM

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hmm?

native mortar Oct 12, 2023, 2:43 AM

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The line won’t connect

void girder Oct 12, 2023, 2:43 AM

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eh show me

native mortar Oct 12, 2023, 2:44 AM

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It’ll be dotted lines bc you can’t buy half of a donut

void girder Oct 12, 2023, 2:44 AM

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ha?

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wdym by tht

native mortar Oct 12, 2023, 2:45 AM

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If I was to connect them

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That would mean all the bits and pieces could be bought too

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Which they can’t

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I can’t buy half a donut

void girder Oct 12, 2023, 2:47 AM

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mmmm im not sure about this

native mortar Oct 12, 2023, 2:47 AM

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this is how I was taught lmfao

void girder Oct 12, 2023, 2:47 AM

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ok

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then just go with it

native mortar Oct 12, 2023, 2:47 AM

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She just said it implies that parts can be bought

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I don’t understand it either

void girder Oct 12, 2023, 2:48 AM

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mmm ok weird but ok]

native mortar Oct 12, 2023, 2:48 AM

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But she’s a math teacher so she makes everything more difficult

void girder Oct 12, 2023, 2:48 AM

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lol

native mortar Oct 12, 2023, 2:48 AM

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E says tell the real world meaning of the slope and price intercept

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Price intercept would equal the price of a box

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Then slope is price of a single donut?

void girder Oct 12, 2023, 2:50 AM

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native mortar E says tell the real world meaning of the slope and price intercept

price intercept mean that y intercept right so when y intercept meaning x =0

native mortar Oct 12, 2023, 2:50 AM

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Yes

void girder Oct 12, 2023, 2:50 AM

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thus meaning when the donuts is =0

native mortar Oct 12, 2023, 2:50 AM

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Confusing bruh

void girder Oct 12, 2023, 2:50 AM

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so if u were to write in the equation p=1/5(0)+0.15

native mortar Oct 12, 2023, 2:51 AM

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So what’s the real world meaning of it?

void girder Oct 12, 2023, 2:51 AM

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what is the coordinate for price intercept

native mortar Oct 12, 2023, 2:51 AM

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.75

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No

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1.15

void girder Oct 12, 2023, 2:52 AM

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mmmm

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what does y intercept mean

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?

native mortar Oct 12, 2023, 2:52 AM

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Where a point hits the y- axis

void girder Oct 12, 2023, 2:52 AM

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yes which means

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x xoordinate will be 0

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correct

native mortar Oct 12, 2023, 2:53 AM

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X=0

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Yes

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Taxes?

void girder Oct 12, 2023, 2:53 AM

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or profits

native mortar Oct 12, 2023, 2:53 AM

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Oh ok

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Then slope would be the price of a donut

void girder Oct 12, 2023, 2:53 AM

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ye should be

native mortar Oct 12, 2023, 2:54 AM

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Awesome

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Tysm for the help

#donut problem