Algebra 1 help????

Question

If set A= {2,4,6,7} B= {3,5,7,8} C= {2,5,6,7}

Find (A union C)intersection B

Please help. thank you so much.

Answer 1

a union c = {2,4,5,6,7}
so when intersected with b = {5,7}

Answer 2

Union Set means : ALL elements in BOTH sets.

Set A = {2, 4, 6, 7}

Set C = {2, 5, 6, 7}

Let U = union

{2, 4, 6, 7} U {2, 5, 6, 7} = {2, 4, 5, 6, 7}

So, the UNION of Set A and Set C = {2, 4, 5, 6, 7}

Intersection means: elements where sets overlap.

If you intersect Set B and Set C, you will find that only the numbers 5 and 7 appear in BOTH of these sets.

Let n = intersect

Set B n Set C = {5, 7}

Answer 3

A U C leads to a set with all the elements of both A and C. So that is {2,4,5,6,7} The intersection of this set with B includes ONLY those elements common to both. So that is {5,7}

Answer 4

All this means is that you take all the objects in set A or set B. Call this new set set Z. Then you see what objects are in BOTH this new set(set Z) and set C. your answer is 2, 5, 6, 7

Answer 5

A union C is (2,4,5,6,7) if you intersecate with B you have as final risult (5, 7)

Answer 6

union is like saying 'or'
pick a number that is in set A OR set C.
then which of those numbers is also in B?
A union C is 4 or 5
in set B there is a 5
so i guess thats it
if i remember correctly

Answer 7

2,6,7 because they are in both a and c

Answer 8

{5,7}