Find X, AB, BC, and AC if ABC is equilateral. X = AB = BC = AC =
1 answer:
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a) You are told the function is quadratic, so you can write cost (c) in terms of speed (s) as
... c = k·s² + m·s + n
Filling in the given values gives three equations in k, m, and n.
Subtracting each equation from the one after gives
Subtracting the first of these equations from the second gives
Using the next previous equation, we can find m.
Then from the first equation
[tex]28=100\cdot 0.01+10\cdot (-1)+n\\\\n=37[tex]
There are a variety of other ways the equation can be found or the system of equations solved. Any way you do it, you should end with
... c = 0.01s² - s + 37
b) At 150 kph, the cost is predicted to be
... c = 0.01·150² -150 +37 = 112 . . . cents/km
c) The graph shows you need to maintain speed between 40 and 60 kph to keep cost at or below 13 cents/km.
d) The graph has a minimum at 12 cents per km. This model predicts it is not possible to spend only 10 cents per km.
Answer:
.
Step-by-step explanation:
Start by finding the slope of this line.
If a slanting line goes through and
, where
, the slope of this line would be:
.
The line in this question goes through and
. Hence, the slope of this line would be:
.
If a slanting line with a slope of and goes through the point
, the equation of this line in the point-slope form would be:
.
For the line in this question, the slope is . Take
as the chosen point on this line. The point-slope form equation of this line would be:
.
Rewrite to obtain the equation of this line in the slope-intercept form:
.
<h2>Answer:</h2>
<em>W=9</em>
<h2>Step-by-step explanation:</h2><em>Hope this helps, here is the answer please mark Brainliest.</em>