K=7
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Answer:
D
Step-by-step explanation:
A does not work, because you stop on the way to the meeting (which you don't)
B does not work, because you speed up on the way to the meeting, when in reality you slow down
C does not work, because it does not show that you went back home or changed speed at all
D is correct!
Do 4x9+5 because you multiply 4 and c and then add on d.
Absolute value of any number is always positive because it represent distance and distance will always positive.
To place chimney at least 30 feet , the distance along the width of the roof (x) will be x = 17.5 feet or x = 2.5 feet.
Since, The height of the roof is described by the function f(x)=−4/3|x−10| + 40
Since, minimum height is 30 feet.
So , substitute f(x)=30 in above expression.
30=−4/3|x−10| + 40
4/3|x−10| = 10
|x−10|=30/4
|x−10| = 7.5
Taking positive case,
x−10 = 7.5
x = 17.5 feet
Taking negative case,
x−10 = - 7.5
x = 10 - 7.5
x = 2.5 feet
Learn more:
brainly.com/question/14473339
Step-by-step explanation:
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