Answer:
<u><em>54.86 or 55, rounded to a whole number</em></u>
Step-by-step explanation:
(128*3) = 384
384/7 = 54.86
This is not a whole number
We'll take out LCM of 24 seconds and 28 seconds.
that is, 168 seconds.
That means,
Car A and Car B will be side by side to each other after 2 mins 48 seconds after start.
The slope of the best fit for the 3 given points is 500, so the correct option is b.
<h3>
How to find the slope?</h3>
Remember that for a line that passes through two points (x₁, y₁) and (x₂, y₂) the slope is:
![s = \frac{y_2 - y_1}{x_2 - x_1}](https://tex.z-dn.net/?f=s%20%3D%20%5Cfrac%7By_2%20-%20y_1%7D%7Bx_2%20-%20x_1%7D)
With the 3 given points we can find 3 slopes, and then we will need to find the average of these 3.
The 3 points are: (3, 2,750), (6, 4,200), and (9,5,750)
Then the 3 slopes are:
![s_1 = \frac{4,200 - 2,750}{6 - 3} = 483.3\\\\s_2 = \frac{5,750 - 2,750}{9 - 3} = 500\\\\s_3 = \frac{5,750 - 4,200}{9 - 6} = 516.7](https://tex.z-dn.net/?f=s_1%20%3D%20%5Cfrac%7B4%2C200%20-%202%2C750%7D%7B6%20-%203%7D%20%3D%20483.3%5C%5C%5C%5Cs_2%20%3D%20%20%5Cfrac%7B5%2C750%20-%202%2C750%7D%7B9%20-%203%7D%20%3D%20500%5C%5C%5C%5Cs_3%20%3D%20%20%5Cfrac%7B5%2C750%20-%204%2C200%7D%7B9%20-%206%7D%20%3D%20516.7)
The average slope is:
![S = (483.3 + 500 + 516.7)/3 = 500](https://tex.z-dn.net/?f=S%20%3D%20%28483.3%20%2B%20500%20%2B%20516.7%29%2F3%20%3D%20500)
So the correct option is b.
If you want to learn more about slopes:
brainly.com/question/1884491
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