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Colt1911 [192]
2 years ago
14

Can anyone solve it plzzzz ​

Mathematics
1 answer:
Vedmedyk [2.9K]2 years ago
7 0

Answer:

1.A matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns.

2.

Solution given:

We have

Sin²\theta-Cos ²\theta=1

Sin²\theta=1+Cos²\theta

Sin\theta=\sqrt{1-Cos²\theta}

3.

4Tan²\theta+4Cot²\theta-3Tan²\theta-3Cot²\theta

4Tan²\theta-3Tan²\theta+4Cot²\theta-3Cot²\theta

Tan²\theta-Cot²\theta

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What is the area of the circle with a D equals 10
Maslowich

Answer:

A =78.5

Step-by-step explanation:

We need the radius to find the area of a circle

r = d/2 = 10/2 =5

The area of a circle is given by

A = pi r^2

A = 3.14 (5)^2

A =3.14 (25)

A =78.5

7 0
3 years ago
Answer ASAP, Will give brainliest
erastova [34]

Answer:

Step-by-step explanation:

1) ABCD is a trapezium. AB ║ CD

∠ADC + ∠DAB  = 180°  { Co interior angles}

110° + ∠DAB = 180

         ∠DAB = 180 -110

∠DAB = 70°

2) Sum of all angles of trapezium = 360°

∠A + ∠B + ∠DCB + ∠D = 360

70° + 50° + ∠DCB + 110° = 360

                 230 + ∠DCB = 360

                            ∠DCB = 360 - 230

∠DCB = 130°

3) For finding the height, use Pythagorean theorem

height² + base² = hypotenuse²

      height² + 6² = 10²

      height² + 36 =100

               height² = 100 - 36

              height² = 64

               height = √64

height = 8 m

4) a = AB = x m

  b = 9 m

h = height = 8 m

Area of trapezium = 120 m²

\frac{(a+b)*h}{2}\\\\  = 120

\frac{(x+9)*8}{2} =120\\\\\\(x +9)*4 = 120

x + 9 = 120/4

x + 9 = 30

    x = 30 - 9

x = 21 m

AB = 21m

                             

7 0
3 years ago
If a boat depreciates in value according to the simple interest formula Y=20,000(.92)^2 find the rate of decay. Write as a perce
Alexandra [31]

Answer:

Rate of Decay = 8%

Step-by-step explanation:

The decay formula is:

F=P(1-r)^t

Where F is the final value (here, it is given as "Y")

P is the initial value (here, given as 20,000)

r is the rate of decay (what we need to find)

t is the time (given as 2)

Comparing both the equations:

F=P(1-r)^t\\Y=20,000(0.92)^2

We see that:

1 - r  =0.92

We solve for "r":

1 - 0.92 = r

0.08 = r

The rate of decay is 0.08, as a percentage, we need to multiply by 100, so we have:

0.08 * 100 = 8%

Rate of Decay = 8%

6 0
3 years ago
If z = 3 , what is 5 x ( 6 -z)?
Lerok [7]

Answer:

15

Step-by-step explanation:

Just insert 3 wherever the z is at.

5 * (6 - 3)

5 * 3

= 15


8 0
3 years ago
While he was playing a video game, Zach would lose 12 points every time his character’s hat was blown off. In one game, he lost
AlexFokin [52]

Answer:

u would lose 108 points

Step-by-step explanation:

5 0
3 years ago
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