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dedylja [7]
3 years ago
13

A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trip?.

Mathematics
1 answer:
suter [353]3 years ago
8 0

Analyze problem

since the distance is the same, we will not need to do any solving in that part

so, the average of 80 and 100 is

(80+100)/2

which is 90

so, 90 miles per hour

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Answer:

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Step-by-step explanation:

Let x be the first number.

Let y be the second number.

x + y = 2x - 6

x - y = 4y - 10

x = 4y - 10 + y

x = 5y - 10

(5y - 10) + y = 2(5y - 10) - 6

6y - 10 = 10y - 20 - 6

6y - 10 = 10y - 26

6y - 10y = -26 + 10

-4y = -16

y = 4

x - (4) = 4(4) - 10

x - 4 = 16 - 10

x - 4 = 6

x = 6 + 4

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3 years ago
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Answer:

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Step-by-step explanation:

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The two variables present here would be the value of the car, and the time is depreciates for. Time is the independent variable, because it is not affected by the value of car. Since the value of the car is a function of the time, therefore, it is the dependent variable.
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Translate the following sentence into an equation using n to represent the unknown number. Then solve the equation for n.
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It's pretty straightforward and simple:
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So the correct answer is D.



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3 years ago
the function g(x) Is the graph below resulted from shifting the graph of f(x) down 2 units. If f’(2)=8, what is g’(2)?
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Then, f(x) and g(x) are related by:

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Taking the derivative:

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This is because the derivative of a constant number is 0. Finally, evaluating at x = 2:

\begin{gathered} g^{\prime}(2)=f^{\prime}(2) \\  \\ \therefore g^{\prime}(2)=8 \end{gathered}

4 0
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