Using derivatives, it is found that the x-values in which the slope belong to the interval (-1,1) are in the following interval:
(-15,-10).
<h3>What is the slope of the tangent line to a function f(x) at point x = x0?</h3>
It is given by the derivative at x = x0, that is:
.
In this problem, the function is:

Hence the derivative is:

For a slope of -1, we have that:
0.4x + 5 = -1
0.4x = -6
x = -15.
For a slope of 1, we have that:
0.4x + 5 = 1.
0.4x = -4
x = -10
Hence the interval is:
(-15,-10).
More can be learned about derivatives and tangent lines at brainly.com/question/8174665
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Answer:
12 o'clock.
Step-by-step explanation:
As we are talking time we work in mod 12.
9 mod12 + 111 mod12
= (9 + 111) mod12
= 120 mod 12
= 0.
So the time will be 12 o'clock.
Step-by-step explanation:
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10 fewer people
After 15 people get off, 9 get on, 4 get off leaving 5. 5 is 10 less than 15.
You didn’t add a picture !