The common difference if there is one is the constant difference that occurs between any term and the term before it.... in this case:
There is no common difference,
dx=18,20,16,18 the difference or velocity is not constant...
d2x=2, -4,2 the acceleration is not constant...
d3x=-6,6 the thrust is not constant
Now we might be tempted to say that:
d4x=12 and say that that is constant and we COULD make a quartic equation fit all the data points, but without further data points in the sequence there is no mathematical proof that the quartic equation would produce accurate data points outside of the range given...
And solving a system of five equations for five unknowns is tedious for such a problem...a^4+bx^3+cx^2+dx+e=y
10 to 11 = 1 hr
11 to 12 = 1 hr
12 to 1 = 1 hr
total = 3 hours
Answer:
Step-by-step explanation:
Let x represent temperature on 4th day.
We have been given that the temperatures was recorded for the first three days were -2°,10°,and 7°.
The total temperature on f days would be 
.
We have been given that total temperature change was -4°. We can represent this information in an equation as:
Therefore, the temperature on 4th day must be equal to .
if we take 45 as the 100%, what is 27 off of it in percentage?
