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Serjik [45]
3 years ago
6

A circle has a radius 30 cm. What is the area? Show your work.

Mathematics
1 answer:
Talja [164]3 years ago
8 0

Answer:

I believe the area = 2,826

Step-by-step explanation:

A=pie×radius²

A= 3.14×30²

A=3.14×900

A=2,826

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Help worth 20 points due in 10 minutes
Black_prince [1.1K]

Answer:

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3 years ago
Solve the triangle.<br> A = 32°, a = 19, b = 14
Paha777 [63]

Answer:

A = 32°, a = 19, b = 14, B=22.98°, C = 125.02°, c = 29.36

Step-by-step explanation:

We have two sides of the triangle and we have an angle.

A = 32 °, a = 19, b = 14

We use the sine theorem to find the angle B.

We know that according to the sine theorem it is true that:

\frac{sin(A)}{a}=\frac{sin(B)}{b}=\frac{sin(C)}{c}

\frac{sin(32\°)}{19}=\frac{sin(B)}{14}

sin(B)=14*\frac{sin(32\°)}{19}\\\\B=Arcsin(14*\frac{sin(32\°)}{19})\\\\B=22.98\°

We know that the sum of the internal angles of a triangle is always equal to 180.

So:

C=180-32-22.98\\\\C=125.02\°

Finally we find the c side

\frac{sin(A)}{a}=\frac{sin(C)}{c}

\frac{sin(32\°)}{19}=\frac{sin(125.02)}{c}

0.02789=\frac{sin(125.02)}{c}

c=\frac{sin(125.02)}{0.02789}\\\\c=29.36

8 0
3 years ago
Nine more than the product of a number and 2 is equal to 7
elena-s [515]

Answer is -1

explanation:

9  + 2x = 7

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x = -1

6 0
3 years ago
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vivado [14]

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Step-by-step explanation:

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2x + 5y = 4

2x + 5(2) = 4

2x + 10 = 4  subtract 10 from both sides   2x = 4 -10  

2x = -6   so divide both sides by 2 to get x = -3

4 0
3 years ago
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