SOMEONE PLEASE HELP HOMEWORK !COLLEGE ALGEBRA! (PIC IN COMMENT)

- anonymous

SOMEONE PLEASE HELP HOMEWORK !COLLEGE ALGEBRA! (PIC IN COMMENT)

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- anonymous

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@vk278

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well you know what those 'U' s mean, right?

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## More answers

- anonymous

no

- anonymous

i need help on eveything

- anonymous

well the upright u (U) means or. the upside down U means and.

- anonymous

|dw:1378254859939:dw|

- anonymous

the middle of the venn diagram is A and B. it is what they share; what they have in common. If you look at the set A and the set B, you see that they share a few numbers

- anonymous

they both share the numbers: -4, and -6. A and B is {-4, -6}

- anonymous

but the question in the picture is asking for the 'or' not the 'and'. If you have 2 sets, the answer actually is A or B. the answer, i think, is the first option: {{-4, -6, 6, 4} OR {-1, -4, -9, -6, 0}}

- anonymous

yea it is

- anonymous

so you understand now?

- anonymous

hats the answer ?

- anonymous

what is the answer ?

- anonymous

i think thats the answer, yeah

- anonymous

{{-4, -6, 6, 4} OR {-1, -4, -9, -6, 0}}

- anonymous

thts the problem tho

- anonymous

how is tht the answer ?

- anonymous

i don't think you can simplify it further...

- anonymous

the operator 'or' usually deals with True or False, but since this is not using those, it's using sets of numbers, i guess the answer is what i said

- anonymous

noo its wrong

- anonymous

u gave mt the problem as thr answer @abrahamglasser

- anonymous

how do you know it's wrong?

- anonymous

its my hw an i checked it online. it says its wrong.

- anonymous

hmm. umm i'm not sure, sorry

- anonymous

u means the union of both A and B so list all of the elements (numbers) from both A and B and do not repeat numbers

- anonymous

so is it -4, -6

- anonymous

OHH yeah, i remember now! sorry, it does mean union. So it's all the numbers from both sets, but dont write a number twice

- anonymous

so its -9 -6 -4 -1 0 4 6

- anonymous

like this: A = [a, b, c, d] B = [a, e, f, g, h]
A U B = [a, b, c, d, e, f, g, h]

- anonymous

but A 'and' B is [a]

- anonymous

so whats A n B?

- anonymous

A n B is [-4, -6]

- anonymous

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- anonymous

that one is the intersection of A and B so what are the common numbers in both, or should I say what numbers are the same

- anonymous

yep Abraham is correct with -4 -6

- anonymous

thankss

- anonymous

np :D

- anonymous

no problem, sorry for the confusion earlier

- anonymous

i need help wit sometin else imma post it in pic

- anonymous

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@abrahamglasser

- anonymous

ok, so (-2, 0) and [-1, 8] are points on a graph.

- anonymous

i think that if you have a point U another point, the answer is the midpoint.

- anonymous

whats the ansewr i have no clue how to do this

- anonymous

ok. so you have (-2, 0) and [-1, 8]. -2 + -1 is -3. then you divide that by 2, so the first number is -3/2. then you have 0+8 = 8. 8/2 = 4. so the answer is (-3/2, 4)

- anonymous

itts wrong @abrahamglasser

- anonymous

oh, it's talking about a number line, not points on a graph, lol, i answered too fast, sorry. So you have a number line, hold on i'm going to draw it.

- anonymous

|dw:1378256706224:dw|

- anonymous

you have to find what they have in common. which is... hold on

- anonymous

|dw:1378256856423:dw|

- anonymous

and that's the answer!

- anonymous

did it work?

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