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3 years ago

Write -2x^2 (-5x^2 + 4x^3) in standard form

1 answer:

7 0

-2x·-2x·(-5x·-5x+4x·4x·4x) Basically, you write out the number depending on the exponent. So if you have a power/exponent of 3, you write it out multiplied by itself 3 times. Hope this helps!

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For what angles are sine and cosine the same?

Taya2010 [7]

Answer:

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3 years ago

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ArbitrLikvidat [17]

C. It travels for 2 hours, then stops for 2 hours, and finally travels again for 1 hour

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3 years ago

2(5×+3)=4×+18<br><img src="https://tex.z-dn.net/?f=2%285x%20%2B%20%203%29%20%3D%204x%20%2B%2018" id="TexFormula1" title="2(5x +

Mamont248 [21]

Answer:

The value of x = 2

Step-by-step explanation:

Given algebraic expression as :

$2\times (5x + 3)= 4x + 18$

Or, 10x + 6 = 4x + 18

Or, 10x - 4x = 18 - 6

Or, 6x = 12

Or, x = $\frac{12}{6}$

∴ x = 2

Hence The value of x is 2 Answer

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3 years ago

each side of triangle xyz has length 9 .Find the area of the region inside the circumcircle of the triangle but outside the tria

mote1985 [20]

Answer:

The area of the region inside the circumcircle of the triangle but outside the triangle is

$A=\frac{27}{4}[\pi-3\sqrt{3}]\ units^2$

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the area of triangle

we have an equilateral triangle

Applying the law of sines

$A_t=\frac{1}{2}(b^2)sin(60^o)$

where b is the length side of the equilateral triangle

we have

$b=9\ units$

$A_t=\frac{1}{2}(81)sin(60^o)$

$A_t=\frac{1}{2}(81)\frac{\sqrt{3}}{2}$

$A_t=81\frac{\sqrt{3}}{4}\ units^2$

step 2

Find the area of circle

The area of the circle is equal to

$A_c=\pi r^{2}$

The formula to calculate the radius of the circumcircle of the triangle equilateral is equal to

$r=b\frac{\sqrt{3}}{6}$

where b is the length side of the equilateral triangle

we have

$b=9\ units$

substitute

$r=(9)\frac{\sqrt{3}}{6}$

$r=3\frac{\sqrt{3}}{2}\ units$

Find the area

$A_c=\pi (3\frac{\sqrt{3}}{2})^{2}$

$A_c=\frac{27}{4} \pi\ units^2$

step 3

Find the area of the shaded region

we know that

The area of the region inside the circumcircle of the triangle but outside the triangle is equal to the area pf the circle minus the area of triangle

$A=(\frac{27}{4} \pi-81\frac{\sqrt{3}}{4})\ units^2$

Simplify

$A=\frac{27}{4}[\pi-3\sqrt{3}]\ units^2$

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zhuklara [117]

Answer:

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