The answer is 27
hope this helps :)
a. 7/ 8
b. 7/ 3
c. 50 / 24
d. 29/ 6
<h3>What is a fraction?</h3>
A fraction is a part of a whole. It is also known as the number is expressed as a quotient, with the numerator is divided by the denominator.
Simple fractions are made up of both are integers.
Complex fractions has a fraction in the numerator or denominator
Proper fractions, have the numerator less than the denominator.
a. 31/ 2÷ 4
7/ 2 ÷ 4
Take inverse of the second number and multiply
7/ 2 × 1/ 4
Multiply through
7/ 8
b. 3 2/ 3 ÷ 1 4/7
11/ 3 ÷ 11/ 7
Take inverse of the second number and multiply
11/ 3 × 7/ 11
Multiply through
7/ 3
c. 1/ 2 + 3/ 4 + 5/ 6
Find the LCM
12 + 18 + 20/ 24
We the have;
50 / 24
d. 11/ 2 - 2/ 3
Find the LCM
33 - 4/6
29/ 6
Thus, the answers are in improper fractions and can also be written in mixed fractions.
Learn more about fractions here:
brainly.com/question/1622425
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We have the following equation:

If we graph this equation we realize that in fact this is an ellipse with
major axis matching the y-axis. So we can recognize these characteristics:
1. Center of the ellipse: The midpoint C<span> of the line segment joining the foci is called the </span>center<span> of the ellipse. So in this exercise this point is as follows:
</span>
2. Length of major axis:
The line through the foci is called the major axis<span>, so in the figure if you go from -5, at the y-coordinate, and walk through this major axis to the coordinate 1, the distance you run is the length of the major axis, that is:</span>
3. Length of minor axis:
The line perpendicular to the foci through the center is called the minor axis. So in the figure if you go from -2, at the x-coordinate, and walk through this minor axis to the coordinate 2, the distance you run is the length of the minor axis, that is:
4. Foci:Let's find c as follows:

Then the foci are:

<span>n = -2 is the correct answer</span>