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timurjin [86]
3 years ago
9

Please help me!!!!!!!!!​

Mathematics
2 answers:
NeX [460]3 years ago
5 0

Answer:

10 * 5 / 2 = 25 cm

Step-by-step explanation:

Hope this helps

iragen [17]3 years ago
5 0

Answer:

25 cm² is the answer ..... my sister

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Cos(8x+21)=sin(-2x+51) Find the two angles represented in degrees ??? Someone help its 1am I can't do this
wolverine [178]

Answer:

45 and 135degrees

Step-by-step explanation:

Cos(8x+21)=sin(-2x+51) Find the two angles represented in degrees ??? Someone help its 1am I can't do this

In trigonometry, cosx = sin(90-x)

Hence:

Cos(8x+21) = sin(90-(8x+21))

Cos(8x+21) = sin(90-8x-21)

Cos(8x+21) = sin(-8x+69)

Substituting into the expression given, :

sin(-8x+69) = sin(-2x+51)

-8x+69 = -2x+51

-8x+2x = 51-69.

-6x = -18.

X = 18/6

X = 3

Since the angles 8x+21

Angle = 8(3)+21

Angle = 45

The angles represented in degrees are 45 and (180-45) = 135degrees

8 0
3 years ago
In ABC, a = 13,b=21, and c = 27. Find mA.
coldgirl [10]

Answer:

Step-by-step explanation:

a = 13  ; b = 21  ; c = 27

S = (a + b + c)/2

   = \dfrac{13+21+27}{2}\\\\=\dfrac{61}{2}\\\\= 30.5

s- a = 30.5 - 13 = 17.5

s - b = 30.5 - 21 = 9.5

s  -c = 30.5 - 27 = 3.5

Area = \sqrt{s(s-a)(s-b)(s-c)}

        = \sqrt{30.5*17.5*9.5*3.5}\\\\=\sqrt{17747.1875} \\\\=133.21\\\\=133

\dfrac{cbSin \ A}{2}=133\\\\\dfrac{27*21*Sin A}{2}=133\\\\Sin \ A = \dfrac{133*2}{27*21}\\\\Sin \ A = 0.4691\\\\A = Sin^{-1} \ 0.4691\\\\\\

A = 27°

4 0
3 years ago
PLS HELP<br> Find the value of x.
Brilliant_brown [7]

Answer:

Step-by-step explanation:

In algebra, it is easy to find the third value when two values are given. Generally, the algebraic expression should be any one of the forms such as addition, subtraction, multiplication and division. To find the value of x, bring the variable to the left side and bring all the remaining values to the right side.

7 0
3 years ago
A circle is inscribed in a square with a side length of 144. If a point in the square is chosen at random, what is the probabili
____ [38]

Given :

A circle is inscribed in a square with a side length of 144.

So, radius of circle, r = 144/2 = 72 units.

To Find :

The probability that the point is inside the circle.

Solution :

Area of circle,

A_c = \pi r^2\\\\A_c = 3.14 \times 72^2\ units^2\\\\A_c = 16277.76 \ units^2

Area of square,

A_s = (2r)^2\\\\A_s = ( 2 \times 72)^2\ units^2\\\\A_s = 20736\ units^2

Now, probability is given by :

P = \dfrac{A_c}{A_s}\\\\P = \dfrac{16277.76}{20736}\\\\P = 0.785

Therefore, the probability that the point is inside the circle is 0.785 .

4 0
3 years ago
Find the area of a circle with a circumference of 11 pi feet
Aleksandr [31]

Answer: btw i love candy

Step-by-step explanation:

7 0
3 years ago
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