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3 years ago

F(x)=7x^2-8+9x^4÷x+2

Mathematics

1 answer:

kifflom [539]3 years ago

4 0

Im pretty sure tge answers -1.68426

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The base of a triangle is shrinking at a rate of 11 cm/s and the height of the triangle is increasing at a rate of 11 cm/s. Find

Mumz [18]

Answer:

the rate of changes of the area of the triangle

$\frac{dA}{dt} = -11 cm^2 /sec$

Step-by-step explanation:

<u>Explanation</u> :-

The area of triangle( A) = $\frac{1}{2} base X height$ ..........(1)

Let 'b' be the base and 'l' be the length of the triangle

The base of a triangle is shrinking( means decreasing) at a rate of 11 cm/s

that is $\frac{db}{dt} = -11cm/sec$

The height of a triangle is increasing at a rate of 11 cm/s

that is $\frac{dh}{dt} = 11cm/sec$

Given h= 10cm and b = 8cm

<u>The rate of change of triangle </u>

applying uv formula $\frac{d(uv)}{dx} = u( \frac{dv}{dx}) + v(\frac{du}{dx} )$

Differentiating equation (1) with respective to 't'

$\frac{dA}{dt} =\frac{1}{2} ( b(\frac{dh}{dt} )+h ( \frac{db}{dt}))$

substitute all values in above equation, we get

h= 10cm , b = 8cm , $\frac{db}{dt} = -11cm/sec$ and $\frac{dh}{dt} = 11cm/sec$

$\frac{dA}{dt} = 10 (-11) + 8(11 )$

After simplification , we get

$\frac{dA}{dt} =\frac{1}{2} (-110 +88) = -11 cm^2 /sec$

7 0

4 years ago

Read 2 more answers

The equation e=1200+11t represents your elevation e in feet for each minute t you hike from a trailhead. If you graphed this equ

oee [108]

The slope would represent 1200 not sure though y= mx + b

8 0

4 years ago

Help i am in need of help fast pls

photoshop1234 [79]

Hi!

So do 91/7 = 13

which means Frances can do 13 oil changes in 1 day

To find how many he can do in 11 days, multiply 13 and 11

11*13 = 143

Frances can do 143 oil changes in 11 days.

Hope this helps!

6 0

4 years ago

Read 2 more answers

What is 1 m + 8 - 2 m

slamgirl [31]

-m+8 is the correct answer you are welcome

6 0

3 years ago

Find the value of x. Round to the nearest tenth.

tiny-mole [99]

Answer:

x=18.0

Step-by-step explanation:

$x^2=a^2+b^2-2ab\;cos\; (30)$

$x^2=16^2+30^2-2(16)(30)cos(30)$

$x^2=324.62$

$x=18.0$

4 0

2 years ago