Answer:
a. 4600
b. 6200
c. 6193
Step-by-step explanation:
Let
the number of elements in A.
Remember, the number of elements in
satisfies

Then,
a) If
, and if 
Since 
So

b) Since the sets are pairwise disjoint

c) Since there are two elements in common to each pair of sets and one element in all three sets, then

Y+6=(3/2)*x-6
-(3/2)x+y=-12
(3/2)x-y=12
3x-2y=24

Step-by-step explanation:
<h2><em>Factor the </em><em>expression</em></h2>
<em>
</em>
<h2><em>Separate into possible cases</em></h2>
<em>
</em>
<h2><em>Solve the equation</em></h2>
<em>
</em>
<h2><em>Find the union</em></h2>
<em>
</em>
<h2><em>there </em><em>for </em></h2>
<em>
</em>
<em>hope </em><em>it</em><em> help</em>
<em>#</em><em>c</em><em>a</em><em>r</em><em>r</em><em>y</em><em> </em><em>on</em><em> learning</em>
Fourteen hours. The equation is 5x+20=90. Solve for X.