How many elements are in the set {A,B,C}?

2 answers:

7 0

elements in Set A, B and C. Set A, B and C have some elements in common. If 16 elements are in both A and B, 17 elements are in both A and C, and 18 elements are in both B and C, how many elements do all these three of the sets A, B and C have in common? 1.

Julli [10]3 years ago

5 0

<h2>Answer:</h2>

The number of elements in the set {A,B,C} are:

<h2>Step-by-step explanation:</h2>

Set--

A set is a well defined collection of distinct objects.

By well defined we mean that there is no ambiguity or confusion regarding the inclusion or exclusion of any element in the set.

The elements of the set are also known as the objects.

The set with 4 elements is denoted by : {a,b,c,d}

where a,b,c and d are distinct objects.

Here we have a set as:

{A,B,C}

Hence, there are 3 elements in the set.

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An ellipse has a center at the origin, a vertex along the major axis at (0, 17), and a focus at (0, −8). Which equation represen

Marianna [84]

We know that
Since the focus and vertex are above and below each other, rather than side by side, I know that this ellipse must be taller than it is wide.
Then
a² will go with the y part of the equation
Also, since the focus is 8 units below the center, then c = 8
since the vertex is 17 units above, then a = 17
The equation b² = a² – c² gives me
b²=17²-8²-----> b²=225
the equation is
y²/a²+x²/b²=1------> y²/289+x²/225=1

the answer is
y²/289+x²/225=1

see the attached figure