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2 years ago

I WILL GIVE BRAINLIEST TO WHOEVER IS CORRECT

Mathematics

1 answer:

Alla [95]2 years ago

8 0

5
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1 hope this helps now mark me brainliest

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Each exterior angle of a regular polygon measures 60 degree how many sides does a polygon have ?

algol13

360/60=6
The polygon has 6 sides.

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3 years ago

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What is (-3)x(5-7)-9(39/3)

Orlov [11]

Answer:-111

Step-by-step explanation:

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3 years ago

Can you think of any 2x2 matrices d for which cd = dc for all 2x2 matrices c? give 2 different examples of such matricesd.

Ksju [112]

For any arbitrary 2x2 matrices $\mathbf C$ and $\mathbf D$ , only one choice of $\mathbf D$ exists to satisfy $\mathbf{CD}=\mathbf{DC}$ , which is the identity matrix.

There is no other matrix that would work unless we place some more restrictions on $\mathbf C$ . One such restriction would be to ensure that $\mathbf C$ is not singular, or its determinant is non-zero. Then this matrix has an inverse, and taking $\mathbf D=\mathbf C^{-1}$ we'd get equality.

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3 years ago

Will be giving brainliest to the correct one, no links or account will be reported:)

Y_Kistochka [10]

Answer:

Step-by-step explanation:

64+53+ (ㅣ) = 180

117 + (ㅣ) = 180

(ㅣ) = 63

4 0

2 years ago

PLEASE HELP 4 QUESTIONS 90 POINTS

kondor19780726 [428]

1. n^2 -8n +16 = 25

Subtract 25 from both sides

n^2 - 8n + 16 - 25 = 0

Simplify

n^2 - 8n - 9 =0

Factor

(n-9)(n+1) = 0

Solve for n

n-9 = 0, n = 9

n+1 = 0, n = -1

Solution: 9,-1

2. C = b^2/25

Multiply both sides by 25:

25c = b^2

Take square root of both sides

b = +/-√25c

Simplify:

b = 5√C, -5√C

3. d = 16t^2 +12t

subtract d from both side:

16t^2 + 12t -d =0

Use quadratic formula to solve:

t = (3 +/-√(9-4d))/8

4. 5w^2 +10w =40

Subtract 40 from both side:

5w^2 + 10w -40 = 0

Factor:

5(w-2)(w+4)=0

Divide both sides by 5:

(w-2)(w+4)=0

Solve for w:

w-2 = 0, w = 2

w+4=0, w = -4

Solution: 2,-4

4 0

3 years ago

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