Answer:
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From the given f(x) and g(x), the value of (g-f)(2)=1
Given :
The functions are
Lets evaluate (g-f)(2)
To find out g(2), replace 2 for x in g(x) and then replace 2 for x in f(x)
Now we find g(2)-f(2)
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Step-by-step explanation:
Answer:
Speed of plane in still air: 490 mile/hour
speed of wind: 70 mile/hour
Step-by-step explanation:
still speed = x wind speed = w
with wind: speed = still + wind
(x+w) * 3 = 1680 ...a
against wind: speed = still - wind
(x-w) * 4 = 1680 ...b
b-a ... 4x-4w-3x-3w = 0
x-7w = 0
x = 7w
substitution: (7w+w)*3 = 1680 8w = 560 wind speed (w) = 70
still speed (x) = 7w = 490 mile/hour
Answer:
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Step-by-step explanation: