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Mathematics 10 Online
OpenStudy (aripotta):

._.

OpenStudy (aripotta):

c + t = 32 4c + 6t = 148

OpenStudy (anonymous):

Great :)

OpenStudy (aripotta):

c = -t + 32 4(-t + 32) + 6t = 148 -4t + 128 + 6t = 148 2t + 128 = 148 2t = 20 t = 10

OpenStudy (aripotta):

c = -10 + 32 c = 22

OpenStudy (aripotta):

so there were 10 trucks and 22 cars?

OpenStudy (anonymous):

Yup, Hey, I'm out of job here !!!

OpenStudy (aripotta):

lol :) i just wanna make sure i got everything right! this last question is long...let's see how bad it is :<

OpenStudy (anonymous):

Thanks for giving out medal for free =D

OpenStudy (aripotta):

oh wait, you can't help me with it :/

OpenStudy (aripotta):

we can do imaginary coins...

OpenStudy (anonymous):

Okie :)

OpenStudy (anonymous):

How about dime and quarters!

OpenStudy (aripotta):

you'll have to give me your name...are you ok with that? or do i just call you jim-bob?

OpenStudy (anonymous):

Make it cool :P

OpenStudy (aripotta):

lol i don't see how we can do this...do i tell you how many coins i "have"?

OpenStudy (aripotta):

and then you pick a dollar amount?

OpenStudy (aripotta):

idk.

OpenStudy (anonymous):

20 of them

OpenStudy (aripotta):

what do i do...

OpenStudy (aripotta):

:/

OpenStudy (anonymous):

Total value is $2. 75

OpenStudy (aripotta):

OH. i get it

OpenStudy (aripotta):

dimes and quarters, right?

OpenStudy (anonymous):

Go ahead :)

OpenStudy (anonymous):

Let me show you the neat way to show the system :)

OpenStudy (aripotta):

d + q = 20 0.10d + 0.25q = 2.75

OpenStudy (aripotta):

oh ok

OpenStudy (anonymous):

Convert into cents d + q = 20 coins (1) 10 d + 25q = 275 cents (2) -> 10 d + 10q = 200 10 * (1) => 15q = 75 Subtract (2) \ (1) => q = 75/15 = 5 quarters

OpenStudy (aripotta):

o-O

OpenStudy (anonymous):

@AriPotta May be I solve it in my head most of the time and I thought it's short, when I'm expressing out, I'm unsure if it looks better for your eyes :P

OpenStudy (aripotta):

you want me to convert the dollar amount to cents?

OpenStudy (aripotta):

idk :/ i've never seen it done like that lol

OpenStudy (anonymous):

It's always less error without decimals numbers :)

OpenStudy (aripotta):

i mean, i've seen it in cents, just not with the =>

OpenStudy (aripotta):

i usually just go line to line to line

OpenStudy (anonymous):

Just my way to show it connected from above lines

OpenStudy (aripotta):

wait.

OpenStudy (anonymous):

As line 1 and 2 are separated, so no arrow !

OpenStudy (aripotta):

you used elimination?

OpenStudy (aripotta):

i usually do substitution :l

OpenStudy (aripotta):

wait. idk what you did lol

OpenStudy (anonymous):

Okay, as long as you arrive to the correct result, still some time it's difficult to do substitution, though !

OpenStudy (aripotta):

d + q = 20 10d + 25q = 275 d + q = 20 d = -q + 20 10(-q + 20) + 25q = 275 -10q + 200 + 25q = 275 15q + 200 = 275 15q = 75 q = 5

OpenStudy (aripotta):

how would you write that with your => and stuff?

OpenStudy (anonymous):

d + q = 20 -> d = -q + 20 ( because it's connected from the above line)

OpenStudy (aripotta):

d + q = 20 -> 10d + 25q = 275 d + q = 20 -> d = -q + 20 10(-q + 20) + 25q = 275 -> -10q + 200 + 25q = 275 -> 15q + 200 = 275 -> 15q = 75 -> q = 5 like that?

OpenStudy (anonymous):

d + q = 20 -> 10d + 25q = 275 (NO arrow, since line 2 not connected to line 1)

OpenStudy (aripotta):

oh, but everything else would be correct? is that all you do? what about the parentheses

OpenStudy (anonymous):

You shouldn't be bothered about the arrows, like each person has his/her own way of expression :)

OpenStudy (aripotta):

oh

OpenStudy (anonymous):

Is it time for you to sleep?

OpenStudy (aripotta):

d + q = 20 10d + 25q = 275 d + q = 20 d = -q + 20 10(-q + 20) + 25q = 275 -10q + 200 + 25q = 275 15q + 200 = 275 15q = 75 q = 5 d = -q + 20 d = -5 + 20 d = 15

OpenStudy (aripotta):

oh i have a crazy sleep schedule lol

OpenStudy (aripotta):

i sleep whenever i want and wake up whenever i want :l

OpenStudy (anonymous):

=> q = 75/15 = 5 quarters Thus d = 20 - 5 = 15 dimes

OpenStudy (aripotta):

2:21am

OpenStudy (aripotta):

:) thanks again!

OpenStudy (aripotta):

i understand, sleep well :)

OpenStudy (aripotta):

and don't be late!

OpenStudy (anonymous):

Stick around :)

OpenStudy (anonymous):

On the second thought, I still want you to learn my way, it's just 2, 3 lines :P

OpenStudy (aripotta):

lol. lemme see. d + q = 20 10d + 25q = 275 d + q = 20 -> d = -q + 20 10(-q + 20) + 25q = 275 -> -10q + 200 + 25q = 275 -> 15q + 200 = 275 -> 15q = 75 -> q = 5 d = -q + 20 ->d = -5 + 20 ->d = 15 is that right?

OpenStudy (aripotta):

how would you do it? :/

OpenStudy (aripotta):

oh.

OpenStudy (aripotta):

"For the following problems show how the problem is set up, the work to solve the problem, along with the solution." i have to show the steps

OpenStudy (anonymous):

It's just how I think. See you soon :)

OpenStudy (aripotta):

mmk. bai <3

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