Question

ab and ba name the same ray.


always
sometimes
never

Answer 1

The only way ab and ba could mean the same anything is if a = b, but then, it wouldn't be a ray at all - just a point.

What do you think?

Answer 2

i was thinking if it was read backwards, but im not sure if that even makes since haha

Answer 3

Right,
ab would be a ray starting at 'a', passing through 'b', and continuing on past 'b'.
ba would be a ray starting at 'b', passing through 'a', and continuing on past 'a'.

The two rays share only the line segment \(\overline{ab}\). They do NOT share the direction of travel.

Answer 4

ohh,, could you help me with another question as well??

Answer 5

Only if you ask it. :-)

Answer 6

If 3∈A and \[3notinb\] then which of the following statements is not true?

3 is an element of B complement.
3 is an element of A∪B.
3 is an element of A∩B.

but the second ∈ has a slash thru it

Answer 7

If 3∈A and 3∈b, then which of the following statements is not true?

3 is an element of B complement.
3 is an element of A∪B.
3 is an element of A∩B.

but the second ∈ has a slash thru it

Answer 8

Compliment: Hard to say. Do we know the Universe is mad up of ONLY A and B?
Union: True. If it's in either one, it's in the Union.
Intersection: False. If it's not in one, it can't be in the intersection.

Just think it through each piece, one at a time.

Answer 9

im not sure what the symbols mean,,

Answer 10

\(\cap\) = Intersection (Elements in Both Sets)
\(\cup\) = Union (Elements in Either Set)
\(\in\) = Is an Element of...
\(\notin\) = Is NOT an Element of...

Answer 11

wow that makes so much since when you put that in the answers lol i wish i would have knew that before thank you <3

Answer 12

No worries. Oh, just for the record, one probably should start a new thread for a new question. Maybe not, but it is a little confusing when the headers refer to the wrong problem because we started a new one in the middle.

Good work.