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Mathematics 12 Online
sxdsouls:

answer check

sxdsouls:

Yuson must complete 30 hours of community service. She does 2 hours each day. Which linear equation represents the hours Yuson has left after x days?

sxdsouls:

A. y = –2x + 30 B. y = 2x + 30 C. y = –2x – 30 D. y = 2x – 30

sxdsouls:

its B B)

Timmyspu:

Sorry it took me so long I got busy but you are correct with b fish.

Jaynater:

Wait a minute. If she must complete 30 hours of service, and is starting from 0, how is it any of these?

sxdsouls:

It can't be any negatives cuz uh yea

sxdsouls:

so id have b and d

Jaynater:

But it can't be any positives either since she has no hours in yet. I am confusion.

sxdsouls:

B. y = 2x + 30 D. y = 2x – 30

sxdsouls:

it cant be d cuz u arent subtracting or whatever

Jaynater:

Yes, I understand, but like... we shouldn't have 30 yet.

sxdsouls:

No, she needs 30 hours of community service and she does 2 per day

Jaynater:

Yes, but she needs to achieve 30. She has none as of now, at least the problems doesn't tell if she does.

sxdsouls:

did you even read it

Jaynater:

Yes, I did

Jaynater:

She needs 30 hours of service. How many she currently has would be the y-intercept.

Extrinix:

She needs 30 hours, so we're doing a down-graph, meaning that the starting point is 30 (y-int) and it goes down from there, make it -2 So you would have y=-2x+30

sxdsouls:

what

Jaynater:

I see.

Extrinix:

It's complicated, but the wording isn't how many she needs, it's how many she's worked so far

Jaynater:

So, when she reaches 0, she has no more to work for.

sxdsouls:

no wait

Extrinix:

So if she's worked none, that means she has 30 hours to work, and then if she works every 2 hours, the graph goes down

sxdsouls:

`"Which linear equation represents the hours Yuson has left after x days?"`

sxdsouls:

no cuzzo

sxdsouls:

30 / 2

Laylalyssa:

@sxdsouls wrote:
30 / 2
= 15

sxdsouls:

so wouldn't she have 15 left

Laylalyssa:

ion think so

sxdsouls:

what

Laylalyssa:

wait so is it A then

Laylalyssa:

Bc if she did one day we plug in 1 where the x is at y=-2x+30 y=-2(1)+30 y= -2+30 y=28

Extrinix:

^^^ Because if she works for 15 days, she'll complete her 30 hours worth of work.

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