Answer:
b
Step-by-step explanation:
the like terms are +6y and +9y because they both have y as the variable
To find the speed of the boats we will divide the distance by time.
From the graph we finde the boats' speeds as ;

And for the speed of the third boat, we will also divide the distance by time.

As you can see the speed of boat 3 (8 km/h) is more than boat 1 (7 km/h) and boat 2 (5 km/h).
Thus the third boat is faster than both of them.
The answer is B.
You can see the speed of boat 1 and 2 in the picture.
The value of y is, 
We have given that,

We have to determine the value of y,
<h3>What is the formula for the quadratic equation?</h3>

Therefore,we get








Therefore the value of y is,

To learn more about the quadratic equation visit:
brainly.com/question/1214333
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The correct answer is choice C. The mean absolute deviation is a way to show the variability, or how spreadout the data is. When the mean absolute deviations are close to each other, that tells us that they're comparable in how they vary. 6.9 is close to 7.1.
Answer:299.94
Step-by-step explanation:youre welcome