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r-ruslan [8.4K]
3 years ago
5

F(x) = 2x and g(x) = x + 1, find f(3) and find gf(3)

Mathematics
1 answer:
lord [1]3 years ago
8 0

Answer:

6 and 7

Step-by-step explanation:

To evaluate f(3), substitute x = 3 into f(x) , that is

f(3) = 2(3) = 6

To evaluate g(f(3)), substitute f(3) = 6 into g(x)

g(6) = 6 + 1 = 7

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The other line must have the same integers, 0 , 1 and 2 placed in identical form as the first line. Then
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A cyclist travels at distance of 400 meters in 120 seconds towards school, calculate his speed. (Show your work)
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The scalar magnitude of the velocity vector is the speed. The speed is equal to

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in this problem we have

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Speed=\frac{400}{120}

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therefore

<u>the answer Part a) is</u>

the speed is equal to 3.5\frac{m}{sec}

<u>Part b) </u>Find the velocity

we know that

<u>Velocity </u>is a vector quantity; both magnitude and direction are needed to define it

in this problem we have

the magnitude is equal to the speed

magnitude=3.5\frac{m}{sec}

direction=North\ East\ (NE)

therefore

<u>the answer Part b) is</u>

the velocity is 3.5\frac{m}{sec}\ North\ East\ (NE)

Part c)

we know that

the acceleration is equal to the formula

a=\frac{V2-V1}{t2-t1}

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V2=0 \\V1=3.5\frac{m}{sec}

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substitute in the formula

a=\frac{0-3.5}{15-0}

a=-\frac{3.5}{15}\frac{m}{sec^{2}}

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therefore

<u>the answer Part c) is</u>

the acceleration is -\frac{7}{30}\frac{m}{sec^{2}}

This is an example of negative acceleration

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