438 has a three in the tens place :)
<u>Given</u>:
Let X and Y be two sets.
The two sets are given by
and 
We need to determine the value of the set 
<u>Value of the set </u>
<u>:</u>
The value of the set
is the set that contains all the elements that are at least in one of the two sets.
Hence, the union of the set
is given by


Arranging in ascending order, we get;

Thus, the union of the sets X and Y is 
Should be 11.25 because 15 is 1/4 of 60 . U take 1/4 away from 60 so u gotta take 1/4 away from 15 which is 3.75 . And you get 11.25
Answer:the answer is x = -12
Step-by-step explanation:
Answer:
D) 8x²-172x+120
Step-by-step explanation:
Length=2(-2x+20)+6
Width=-2x+20
(-4x+40+6)(-2x+20)
(-4x+46)(-2x+20)
8x²-80x-92x+920
8x²-172x+920