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3 years ago

Atb xan

Mathematics

1 answer:

murzikaleks [220]3 years ago

6 0

Answer:

um i can't really understand what your trying to do here

Step-by-step explanation:

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What is the factorization of the expression below?<br> 4x2-9y2

Ksivusya [100]

Final result :: (2x + 3y) • (2x - 3y)

8 0

3 years ago

One side of a triangle is increasing at a rate of 9 cm/s and a second side is decreasing at a rate of 2 cm/s. if the area of the

LenKa [72]

Use the attached figure to guide yourself through the explanation. In the figure:
$a=21cm, b=36cm, \widehat{C}=\frac{\pi}{6}$ .
We know that:
$\frac{da}{dt}=9,\frac{db}{dt}=-2$
Also remmeber that the area of a triangle is:
$A=\frac{Base\times Height}{2}$
The hegiht is shown in the figure in red, the base is just the b side.
Using the angle C the area of the triangle is:
$A=\frac{1}{2}ab\cos(\widehat{C})\implies2A=ab\cos(\widehat{C})$
Now taking the derivative of the area 2A with respect to t we have:
$2\frac{dA}{dt}=b\cos(\widehat{C})\frac{da}{dt}+a\cos(\widehat{C})\frac{db}{dt}-ab\sin(\widehat{C})\frac{d\widehat{C}}{dt}$

Replacing with the right values:
$\frac{dA}{dt}=0\\
\\
\cos({\widehat{C}})=\frac{\sqrt{3}}{2}\\ \\
\sin({\widehat{C}})=\frac{1}{2}\\ \\

$
yields:
$0=36\frac{\sqrt{3}}{2}.9-21\frac{\sqrt{3}}{2}.2-\frac{1}{2}.21.36.\frac{d\widehat{C}}{dt}\implies \frac{d\widehat{C}}{dt}=\frac{141}{378}\sqrt{3}$

5 0

4 years ago

The table shows the type of super power that 36 students wish they had. Each student could only pick one super power.

tiny-mole [99]

The only statements that is true about the information on the table are:

The ratio of students who wish they had flight to those who wish for invisibility -Ratio 2:3. All other statements/ratios are false/incorrect.

<h3>How do we get the ratio of students who wish they had flight to those who wish for invisibility?</h3>

Ratio is simple math.

The number of people who wish for invisibility are: 12 ; while

The number of people who wish for flight are: 8

Thus the ratio will be given as:

8/12 further simplified by dividing by 4, we have

(8/4) : (12/4)

= 2:3

Hence, only the last statement is true.

Learn more about ratios at:
brainly.com/question/2328454
#SPJ1

3 0

3 years ago

PLEASE HELP! WILL MARK BRAINLIEST!

AfilCa [17]

Number 3 is the correct answer

5 0

4 years ago

What is x ???? help me please

jenyasd209 [6]

Answer:

x = 4

Step-by-step explanation:

The ratio of the side opposite the large filled dot to the hypotenuse is ...

16/20 = x/5

(4/5)(5) = x = 4 . . . . multiply by 5

The value of x is 4.

The angle marks tell us the triangles are similar.

7 0

4 years ago