First off, we'll convert the mixed fractions to "improper",

It depends on what level of classes you take, but algebra classes in college do tend to be harder than algebra classes in high school or middle school.
Answer:
1. 12/1= rate of change
Step-by-step explanation:
1.
1 mile= 30 seconds
(1,30)
6 miles= 1 1/2 minutes
6 miles=90seconds
(6,90)
Formula: y2-y1/x2-x1
90-30/6-1
60/5
12/1= rate of change
hope its right
Answer:
200-20=180
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given
The diameter of a circle is 
So, the radius is 
The circumference is given by 
Insert the values

Thus, the circumference of the circle is