(A) Vertical angles are congruent
Let U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z} C = {v, w, x, y, z}. List the elements in the set: A
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Answer:

Step-by-step explanation:
Given:
,
,
,
.
To find: The elements in the set
.
Solution:
We have,




Now,
will contain all the elements in the set
and all the elements in set
.
So,
.
Hence,
.
It would be y=(x+4)²+9.
To complete the square, we divide the value of b, the coefficient of x, by 2 and square it:
(8/2)² = 4² = 16
We would add 16 to this in order to have a perfect square; but we would also need to subtract 16 at the end to keep it equal. This would give us:
y=(x²+8x+16)+25-16
y = (x+4)² + 9
Answer:
A
Step-by-step explanation:
A population is a set of similar items or events which is of interest for some question or experiment.
Their are many different types of atoms in the universe. It can include the proton, neutron, and the electron. Also, the quark is a particle but is not found alot.