SarahLove<3
A group of 19 students want to see the show at the planetarium. Tickets cost $11 for each student who is a member of the planetaruim's frequent visitor program and $13 for each student who is not a member. The total cost of the student's tickets is $209.
How many students in the group are members of the frequent visitor program? How many are not members? Explain how you know. @Squirrels @prowrestler @dan815
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SarahLove<3
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Please help :)
dan815
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x+y=19
11(x)+13(y)=209
solve for x and y
prowrestler
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is there a shorter version to do this that' should be a lot of work
SarahLove<3
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I solve for it and I always get like 19 or some decimal o-o
SarahLove<3
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It just doesn't seem right!
prowrestler
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i think i got a decimal also
SarahLove<3
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But putting the decimal back in for x and such it doesn't add up correctly to 209 v-v I was told that @dan815 was really smart, I was hoping he could help me
SarahLove<3
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@kc_kennylau can you assist me? I really need help with this v-v
kc_kennylau
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(1)x11: 11x+11y = 209 ---(3)
(2)-(3): 2y=0 --> y=0 ---(4)
(4)>(1): x=19 ---(5)
SarahLove<3
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x = 19?
SarahLove<3
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So there are no non members? o_O
kc_kennylau
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yep
SarahLove<3
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OMG SO I WAS RIGHT THE WHOLE TIME
SarahLove<3
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It just seemed so weird, why would they have it like that o-o
kc_kennylau
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Never doubt yourself :p
SarahLove<3
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I'm in an Algebra honors class, I get everything else except these type of problems v-v
SarahLove<3
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So when something that weird shows up, I'm unsure if it's correct or not
SarahLove<3
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But thank you so much @kc_kennylau !!!
Also, what grade level are you at, just curious :)
kc_kennylau
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I'm at a level equivalent to grade 9
kc_kennylau
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I will be at a level equivalent to grade 10 in september
SarahLove<3
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How o_O
SarahLove<3
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Like how old are you?
kc_kennylau
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15
SarahLove<3
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Ok c;
prowrestler
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how are you that smart
SarahLove<3
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People work really hard to get to that level of intellect!
prowrestler
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good job man
SarahLove<3
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Only confusing thing know is me wondering why he did those:
---3
---4
---5
o_O
SarahLove<3
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now*
SarahLove<3
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Is that some sort of way to keep your equation organized or something
kc_kennylau
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So that I can refer to the equations
SarahLove<3
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yeah :P
So all that stuff like (4) > 1:
is a system you developed for when you answer questions on here? Wow...interesting
kc_kennylau
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I usually write subst (4) into (1) in exams
kc_kennylau
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But I'm too lazy
kc_kennylau
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So that's a yes
SarahLove<3
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Arent we all lazy in our own special little ways? haha :P
kc_kennylau
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I suppose so ;)