3 years ago

How can you find f(2) if f(x)=−3x2−7?

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

7 0

Step-by-step explanation:

F(2)=3(2)²-7

................

You might be interested in

How do i write the opposite of one-third of a number is greater than 9

gtnhenbr [62]

1/3x<9. This is the....may be

7 0

3 years ago

Read 2 more answers

Winter break starts in 3 4/7 weeks. Write a fraction greater than one

kvasek [131]

Im not sure i understand the question, but i think 25/7

8 0

3 years ago

Read 2 more answers

The amount of time it takes a swimmer to swim a race varies inversely as the average speed of the swimmer. A swimmer finishes a

yarga [219]

Answer:

5 average speed

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Which relation is a function?

Degger [83]

Answer: Id say C.

Step-by-step explanation: The other two can't possibly be a function.

<h2><em>Mark as brainliest if im correct please</em></h2>

5 0

3 years ago

A 25-foot ladder is placed against a vertical wall. Suppose the bottom of the ladder slides away from the wall at a constant ra

dsp73

Answer: The ladder is sliding down the wall at a rate of $5\dfrac{17}{50}\ ft/sec$

Step-by-step explanation:

Since we have given that

Length of ladder = 25 foot

Distance from the wall to the bottom of ladder = 15 feet

Let base be 'x'.

Let length of wall be 'y'.

So, by pythagorus theorem, we get that

$x^2+y^2=25^2\\\\15^2+y^2+625\\\\225+y^2=625\\\\y^2=625-225\\\\y^2=400\\\\y=\sqrt{400}\\\\y=20\ feet$

$\dfrac{dy}{dx}=-4\ ft/sec$

Now, the equation would be

$x^2+y^2=625\\$

Differentiating w.r.t x, we get that

$2x\dfrac{dx}{dt}+2y.\dfrac{dy}{dt}=0\\\\2\times 15\dfrac{dx}{dt}+2\times 20\times -4=0\\\\30\dfrac{dx}{dt}-160=0\\\\\dfrac{dx}{dt}=\dfrac{160}{30}=5.34\ ft/sec$

Hence, the ladder is sliding down the wall at a rate of $5\dfrac{17}{50}\ ft/sec$

8 0

3 years ago