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1 year ago

If f(x) = -x2+x-1 then value of f(f(2)) is

Physics

1 answer:

qaws [65]1 year ago

6 0

Answer:

Explanation:

<u>Function</u>

f(x) = -x² + x - 1

<u>Solving</u>

Substitute 2 in place of x
f(2) = -(2)² + 2 - 1
f(2) = -4 + 2 - 1
f(2) = -3
f(f(2)) = f(-3)
f(-3) = -(-3)² - 3 - 1
f(-3) = -9 - 3 - 1
f(f(2)) = <u>-13</u>

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MaRussiya [10]

Answer:

The automobile's acceleration in that time interval is -2 m/s^2

Explanation:

The acceleration is defined as the rate of change of the velocity.

The average acceleration in a given lapse of time is calculated as:

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In this case, we have:

initial velocity = 31 m/s

final velocity = 15 m/s

time = 8 seconds.

Then the average acceleration is:

A = (15m/s - 31m/s)/8s = -2 m/s^2

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1 year ago

How much power will it take to move a 50Kg box 10m across a floor that has -50N of Frictional forces in 3 seconds?

likoan [24]

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2 years ago

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Sliva [168]

The stopwatch will be the most useful in determining the kinetic energy of a 50 g battery- powered car traveling a distance of 10 m.

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1 year ago

Suppose I have a vector that is 7 units long and that makes an angle of +30 degrees from the positive x-axis. I want to add to t

Vinil7 [7]

Answer:

sum of these two vectors is 6.06i+3.5j-3.5i+6.06j = 2.56i+9.56j

Explanation:

We have given first vector which has length of 7 units and makes an angle of 30° with positive x-axis

So x component of the vector $=7cos30^{\circ}=7\times 0.866=6.06$

y component of the vector $=7sin30^{\circ}=7\times 0.5=3.5$

So vector will be 6.06i+3.5j

Now other vector of length of 7 units and makes an angle of 120° with positive x-axis

So x component of vector $=7cos120^{\circ}=7\times -0.5=-3.5i$

y component of the vector $=7sin120^{\circ}=7\times 0.866=6.06j$

Now sum of these two vectors is 6.06i+3.5j-3.5i+6.06j = 2.56i+9.56j

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2 years ago

Superman is supposed to leap tall buildings in a single bound. Suppose that he obeys the normal laws of physics in this feat. Es

lys-0071 [83]

Answer:

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In order to make the jump Superman's initial velocity must be greater than or equal to 31.32 m/s

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2 years ago