Look, I need the steps on how to do 7-10 I will lose my grade please help me

Question

pphalke · Answer

attachment

whpalmer4 · Answer

Okay, first things first: do you know what the U and upside-down U mean?

pphalke · Answer

no not really

whpalmer4 · Answer

U means union — the set of everything that appears in any of those sets.

$$\{1,2\} \cup  \{3,4\} = \{1,2,3,4\}$$

whpalmer4 · Answer

$\cap$ means intersection — the set of only those things which appear in both sets

$$\{1,2\}\cap\{1,2,3,4\} = \{1,2\}$$

whpalmer4 · Answer

So, you know that $$A = \{1,2,3,4\}$$$$C = \{1,3,5,7,9\}$$what is $$A\cup C=$$

whpalmer4 · Answer

it is the set of every member which occurs in either A or C.  Will you list all of those values as a set, please?

pphalke · Answer

A U C  
I don't know

whpalmer4 · Answer

What are the members of set A?
What are the members of set C?
Make a list that combines them.

pphalke · Answer

how do I do that

whpalmer4 · Answer

Look at my posting from a few minutes ago, where I wrote "A = {..." 

Those numbers inside the { } are the members of set A.  Write them down on a piece of paper.

Now look at the next line of that post, where I wrote "C = {..."
Write those numbers down on the same piece of paper, except if the number already is present, you do not need to write it again.  You now have a list of all of the members of A and C, which is the answer for problem 7, when written as a set.

pphalke · Answer

is it supposed to be a number for the answer? if so then 9

pphalke · Answer

@whpalmer4

whpalmer4 · Answer

What is the list that you made by following those instructions?

pphalke · Answer

you mean the question one? I don't know

whpalmer4 · Answer

I told you to do a number of steps.  Did you do anything?