For each graph below, state whether it represents a function.
1 answer:
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We have been given a table of quiz scores whose standard deviation is 5.6. We are asked to find the test scores that are within one standard deviation of the mean.
First of all, we will find the mean of the test scores using average formula.
The scores within one standard deviation would be mean plus one SD and mean minus one SD that is:
Therefore, the quiz scores 17.15 and 28.35 are within one standard deviation of the mean.
Answer:
<h2>The lifeboat has coordinates (5,10).</h2>Step-by-step explanation:
The equation represents the light beam from Ship A, which has coordinates
.
The equation represents the light beam from Ship B, which has coordinates
.
This problem models a system of linear equations, because we need to find the coordinates of the lifeboat, which is a common points for both ships. So, basically, we just need to find the solution for the system formed by both equations.
We multiply the first equation by -1, and then sum
Now, we use this value to find the other one
Therefore, the lifeboat has coordinates (5,10).
The image attached shows the solution graphically.
