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2 years ago

50 points and BRAINLIST

Mathematics

2 answers:

Tems11 [23]2 years ago

8 0

Step-by-step explanation:

The answer is 10 percent

Svetradugi [14.3K]2 years ago

4 0

Step-by-step explanation:

10% is the answer of this questions

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Please help. I don't understand this.

klio [65]

Answer:

radius=6

Step-by-step explanation:

arc ACB=6xPi

Pi=3.14159

arc ACB=18.85 (rounded to 2 places)

ACB is a half circle so a full circle would be 18.85x2 or 37.7

circumference (whole circle)=2 x Pi x radius

37.7=2 x 3.14159 x radius

radius= 37.7/(2 x 3.14159)

radius=6

7 0

2 years ago

The sum of three consecutive integer is -204. what is the largest integer? -63 --44--67 -62

Lisa [10]

-x + -x-1 + -x-2 = -204
-3x=-201
x=-67

-67-68-69=-204

5 0

2 years ago

Integrate the following

enot [183]

I suppose you mean to have the entire numerator under the square root?

$\displaystyle\int_2^4\frac{\sqrt{x^2-4}}{x^2}\,\mathrm dx$

We can use a trigonometric substitution to start:

$x=2\sec t\implies\mathrm dx=2\sec t\tan t\,\mathrm dt$

Then for $x=2$ , $t=\sec^{-1}1=0$ ; for $x=4$ , $t=\sec^{-1}2=\frac\pi3$ . So the integral is equivalent to

$\displaystyle\int_0^{\pi/3}\frac{\sqrt{(2\sec t)^2-4}}{(2\sec t)^2}(2\sec t\tan t)\,\mathrm dt=\int_0^{\pi/3}\frac{\tan^2t}{\sec t}\,\mathrm dt$

We can write

$\dfrac{\tan^2t}{\sec t}=\dfrac{\frac{\sin^2t}{\cos^2t}}{\frac1{\cos t}}=\dfrac{\sin^2t}{\cos t}=\dfrac{1-\cos^2t}{\cos t}=\sec t-\cos t$

so the integral becomes

$\displaystyle\int_0^{\pi/3}(\sec t-\cos t)\,\mathrm dt=\boxed{\ln(2+\sqrt3)-\frac{\sqrt3}2}$

7 0

2 years ago

Question 8/Multiple Choice Worth 1 points)

Hunter-Best [27]

Answer:

k = 3

Step-by-step explanation:

Given

f(x) = 0.5x

g(x) = 0.5x - k

Required

Find k

The question illustrates changing of positions of lines along the x and/or y axis;

But in this case; if graph f(x) is shifted down, then it represents a negative shift of points in the y axis.

Given that f(x) = 0.5x

and f(x) is shifted down by 3 units to give g(x); then:

f(x) - 3 = g(x)

Substitute 0.5x for f(x)

0.5x - 3 = g(x)

Recall that g(x) = 0.5x - k ---------- (given)

0.5x - 3 = 0.5x - k

Subtract 0.5x from both sides

-0.5x + 0.5x - 3 = -0.5x + 0.5x - k

-3 = -k

Multiply both sides by -1

-3 * -1 = -k * -1

3 = k

k = 3

Hence, the value of k is 3

8 0

2 years ago

in a box of 36 pencils 20 are sharpened what is the ratio of sharpened pencils to unsharpened pencils

OleMash [197]

Answer:

20 : 16

or if you have to reduce then the answer is 5 : 4

Step-by-step explanation:

4 0

2 years ago