Can someone be nice enough to help me please

- wintersuntime

Can someone be nice enough to help me please

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- wintersuntime

http://westada.org/cms/lib8/ID01904074/Centricity/Domain/2795/2.4.pdf

- wintersuntime

It's the second page 17

- Vocaloid

so we're given y = mx + b, and we want to solve for b
subtract mx from each side to get b by itself

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## More answers

- wintersuntime

I have to subtract 3x on each side

- Vocaloid

where are you getting 3 from?

- wintersuntime

It's on question 13

- Vocaloid

I thought you wanted question 17?

- wintersuntime

No I need help on all of them

- Vocaloid

ok, let's start with 13 then

- Vocaloid

so we have 3x + 5y = 30, so yes, we would start by subtracting 3x from each side

- Vocaloid

5y = 30 - 3x, do you know where to go from there?

- wintersuntime

|dw:1443140077390:dw|

- wintersuntime

subtract 3x on both sides

- Vocaloid

right, so that gives us
5y = 30 - 3x, now keep going

- wintersuntime

|dw:1443140208422:dw|

- wintersuntime

like that ?

- Vocaloid

uh, not quite. we want y by itself, but we have 5y, so we divide everything by 5

- Vocaloid

5y = 30 - 3x
y = (30-3x)/5

- wintersuntime

The answer is 5.4

- wintersuntime

|dw:1443140424012:dw|

- Vocaloid

uh, not quite, you just stop when you get
y = (30-3x)/5

- Vocaloid

the question asked us to get y, and we got y, so y = (30-3x)/5 is our final answer

- wintersuntime

is that suppose to be dividing before 5

- Vocaloid

yes

- wintersuntime

For the next the first step is 6y=360-24x

- wintersuntime

I thinks I did it wrong

- wintersuntime

because it says for x

- Vocaloid

yeah, so we want x by itself
start by subtracting 6y from both sides

- wintersuntime

24x=6y-360 like that <-

- Vocaloid

almost
24x = 360 - 6y
now we want x by itself, so we divide both sides by 24
x = (360-6y)/24

- wintersuntime

Do I just put the equation or do I have to solve it

- Vocaloid

that's it, our answer is x = (360-6y)/24

- wintersuntime

oh okay

- wintersuntime

The next one is hard

- Vocaloid

start by multiplying both sides by 32

- wintersuntime

It starts 1280-80d=32c

- Vocaloid

good, now subtract 1280 from both sides

- wintersuntime

Do i also subtract 1280 to 80 or 32 ?

- Vocaloid

nope, since 80 and 32 are attached to variables (letters) we leave them alone

- Vocaloid

-80d = 32c - 1280
divide both sides by -80 now

- wintersuntime

It's -1328

- wintersuntime

@Vocaloid

- Vocaloid

uh, not quite, remember that 32c and 1280 can't be put together because of the c
-80d = 32c - 1280
d = (32c-1280)/(-80)

- wintersuntime

oh so thats the equation

- wintersuntime

I need help on question 16

- wintersuntime

@Vocaloid

- Vocaloid

multiply both sides by (9/5) first

- wintersuntime

or 5/9

- Vocaloid

nope, we want to multiply by (9/5) to get rid of the (5/9)

- wintersuntime

oh okay

- wintersuntime

idk what would be the equation

- wintersuntime

I'm struggling

- Vocaloid

(9/5)C = F - 32
now add 32 to both sides

- wintersuntime

I add 32 to 32 and 9/5

- Vocaloid

nope, leave the 9/5 alone since its attached to c
(9/5)C + 32 = F

- wintersuntime

So the equation would be 9/5c+32=f

- Vocaloid

yes, or you can flip it around to get
F = (9/5)C + 32

- wintersuntime

For the next questions is not even using numbers ?

- Vocaloid

y = mx + b
subtract mx from both sides

- Vocaloid

just treat mx like a number

- wintersuntime

Is it y=(mx-b)

- Vocaloid

uh, not quite
y - mx = mx + b - mx
now keep going

- wintersuntime

you cancel out mx

- Vocaloid

good, so that leaves us with
y - mx = b
and since the question wants b by itself, we're done

- Vocaloid

b = y - mx

- wintersuntime

oh

- Vocaloid

ok, last one
Ax + By = C
start by subtracting Ax from both sides

- wintersuntime

Isn't it y=c/b-a/b*x

- wintersuntime

Thank you so much sorry for bothering you all the time

- Vocaloid

almost, Y = C/B - A*x/B
and don't apologize, you aren't a bother :)

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