What you can do is multiply 400*20= 8,000. From here, we know that 399*20 is just one less group of 20 than 400. Therefore, we can subtract (1*20) from 8,000 to get the final answer.
8000-20=7980
Hope this helps!
To calculate circumference, you must use the equation (65)(2)(Pi) which would be 408.2pm. (IF YOU COUNT PI AS 3.14)
Answer:
Nothing Changed
Step-by-step explanation:
at 7:30 it was −4°F and at 9:27 it was still −4°F.
However in-between the timelines +58° then it went down 58°
The answer is 24 square units
Answer:


Step-by-step explanation:
The question and the attached image are different. However, the attached image answers the question y = -4 correctly.
So, I will solve for: 
Given

Required
Possible values of x and y
Let x = 0:



So, we have:

Let y = 4


Collect Like Terms


So, we have:

<em>So, all you need to do is: assume a value for either x or y, then solve for the other variable.</em>