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Maslowich
3 years ago
10

A circle has a sector with area \dfrac{1}{2}\pi 2 1 ​ πstart fraction, 1, divided by, 2, end fraction, pi and central angle of \

purple{\dfrac{1}{9}\pi} 9 1 ​ πstart color #9d38bd, start fraction, 1, divided by, 9, end fraction, pi, end color #9d38bd radians . What is the area of the circle?
Mathematics
1 answer:
balu736 [363]3 years ago
8 0

Answer:

Area of circle = 9<em>π</em>

Step-by-step explanation:

Area of sector = \frac{1}{2} \pi

Its central angle = \frac{1}{9}\pi \text{ radians}

\text{Area of sector} = \dfrac{\text{Central angle}}{2\pi} \times\text{Area of circle}

\text{Area of circle} = \text{Area of sector}\times\dfrac{2\pi}{\text{Central angle}}

A = \dfrac{1}{2}\pi\times\dfrac{2\pi}{\frac{1}{9}\pi} = 9\pi

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Answer:

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4: 3.5*π*2= 21.99

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3 years ago
Two members of the Math Competition Team solve 13 problems in 1 hour. Assume all team members solve problems at the same rate. H
mylen [45]

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3 years ago
Look at this graph:
pickupchik [31]
<h3>Answer:</h3>

The Slope is 2

<h2>Explanation:</h2>

Notice that both the points, (60,0) and (70,20), are on the line. So we can use those points to calculate the slope. Recall that that slope of the line m can be calculated by \frac{y_2 -y_1}{x_2 -x_1}\\ if we have the points, (x_1,y_1) and (x_2,y_2).

<h3>Calculating for the slope of the line:</h3>

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3 years ago
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Sonbull [250]
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We are looking for a function with a vertex above the x-axis and a function that opens upward (has coefficient a > 0).

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We can solve this algebraically with the knowledge that the real solutions of a quadratic are its x-intercepts. If there are no x-intercepts (because it lies entirely above or below the x-axis), then there are no real solutions. This is true when the discriminant b^2-4ac \ \textless \  0. You can see that from the quadratic formula. This holds true for both answers A and C, so to find the correct one, we remember that when the coefficient a of the x^2 term is positive, the graph opens upwards, so we choose C.
5 0
3 years ago
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The ratio of the measures of all three angles in a triangle is 14:5:11. Find the measures of the angles.
Maru [420]

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6 0
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