Answer:
18. x² + x - 4
20.
or 
22. x² + 2x - 2
Step-by-step explanation:
For some reason my work was unable to be submitted so please see attachment for detailed explanation
Answer:

Step-by-step explanation:
we know that
The linear equation in slope intercept form is equal to

where
m is the slope
b is the y-intercept or initial value
Let
y ----> total weekly pay
x ---> is the number of computers sold in a week
In this problem we have


substitute

The circumference<span> of a circle is the distance around the circle. </span>The circumference of a circle is calculated by the expression:
Circumference = 2πr
Circumference = 2π(30 inches)
Circumference = <span>94.2 inches
</span>
Therefore, the correct answer from the choices listed above is option C. Hope this answers the question.
Answer:
A
Step-by-step explanation: