Answer:
X = 3
Step-by-step explanation:
first you would do 2 * 5x - 2 * 7 = 2x+10
second you'll get 10x- 14 = 2x + 10
third subtract the 2x by the 10x
fourth you'll get 8x
fifth then add the 14 to the 10
sixth 8x = 24
divide that by 8x to both sides
so then you get x=3
Answer:
B. cost(time)
Step-by-step explanation:
In the information given above, you can eliminate choices "A," and "D," since they're just using the cost of a repair and the time the mechanic works. This leaves us with either "B," or "C." The correct answer is "B," because the cost of the repair depends on whatever is inside the parenthesis (the time).
f(x+h) = 
Step-by-step explanation:
Given,
f(x) = 
To find the value of f(x+h) we need to replace x by x+h
Hence,
f(x+h) = 
=
[Here, we apply the formula of 
]
The extreme values of the function f(x) = x - 4sqrt(x) occur at the values of x for which f'(x) = 0
f'(x) = 1 - 2/sqrt(x) = 0
sqrt(x) - 2 = 0
sqrt(x) = 2
x = 4
To check for minimum or maximum,
f''(x) = 1/(sqrt(x))^3 = 1/(sqrt(4))^3 = 1/(2^3) = 1/8 => the point is a minimum.
Therefore, the minimum value = f(4) = 4 - 4sqrt(4) = 4 - 4(2) = 4 - 8 = -4 and occurs at x = 4.
