Answer:
9
Step-by-step explanation:
4.20 / 4 = 1.05
105 x 9 = 9.45
Answer:
D. The 3rd nap is the least consistent in duration because its standard deviation is the highest.
Step-by-step explanation:
plato :)
Answer:

Step-by-step explanation:
In this exercise, we have two equations, namely:

And we are asked to solve this problem by graphing. In this way, we can write a system of linear equations in two variables, but first of all, let's rewrite:

Then:

So here we have two lines.
The first one is:

This line passes through the origin and has a slope 
The second one is:

This line has a slope
and cuts the y-axis at 
By using graph tools, we get the graph shown below, then:

The answer is -17 hope this helps