Answer:
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<h2>Given expression:</h2>

<h2>Simplify it in steps:</h2>
<h3>Step 1</h3>
Bring both fractions into common denominator:

<h3>Step 2</h3>
Simplify:






<h3>Step 3</h3>
Compare the result with given expression to get:
Answer:
7
Step-by-step explanation:
1, 1, 2, 4, 7, 8, 10, 15, 20
median = 7
There is a difference of 123 square inches between the pizza box and the pizza.
18x18=324
pi8^2=201.0619
324-201=123
Answer:
k=20
Step-by-step explanation:
when x approaches 4, the denominator x-4 approaches 0
if the denominator is 0, it means that this is invalid
if the function is a number over 0 when x=4, it represents a vertical asymptote, which means no limit
so the only way possible to let there be a limit is to let the function be 0/0 when we plug in x=4
so x^2 + x - k = 0 when x = 4
4^2 + 4 - k = 0 ==> 20 - k = 0 ==> k = 20
I cant really show you how to graph this but i can try to explain it. you would make a 4 quadrant graph and do rise over run.
1)start by making the graph
2) on the line of the graph marked Y is where you would put -4
3) From -4, you would go up (rise) by 2 and go over to the right 1 where you end is the slop