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d1i1m1o1n [39]
2 years ago
12

Find the value of x. A. X = 90 B. X = 32 C. X = 30 D. X = 15

Mathematics
2 answers:
fenix001 [56]2 years ago
8 0
Correct answer is D x=15
Verizon [17]2 years ago
5 0
A or d…………………………… ……
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Let f(x) = 1/x . Find the number b such that the average rate of change of f on the interval [2, b] is − 1/8
vekshin1

Answer:

b=4

Step-by-step explanation:

So, we have the function f(x)=1/x. We need to find b such that the average rate of change or the slope is -1/8 between the intervel [2, b]. First, let's find f(2).

f(2) = 1/(2) = 1/2

So, we have the point (2, 1/2)

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\frac{y_2-y_1}{x_2-x_1}=\frac{.5-\frac{1}{b} }{2-b}  =-1/8

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4b-8=b^2-2b

b^2-6b+8=0

Solve for b. Factor using the numbers -4 and -2.

=(b-4)(b-2)=0

Thus, b=4 or b=2.

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4 0
2 years ago
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