3 years ago

Find the area of a circle with a circumference of 3.14 units

Mathematics

1 answer:

Nadusha1986 [10]3 years ago

7 0

ANSWER 0.784602

If the circumference of the circle is equal to 3.14 units, to find the area

The area of a circle can be calculated using the diameter or the radius with two different formulas: A = πr2 or A = π(d/2)2, where π is the mathematical constant approximately equal to 3.14,r is equal to the radius, and d is the diameter.

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2x – бу = 12 -5x - 15 = -30

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Answer:

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Step-by-step explanation:

we have -5x - 15 = -30 <=> x + 3 = 10

x= 7

if x=7

so 2×7 - 6y = 12 <=> 14 - 12 = 6×y

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There are 450 people at a play, the total receipt for $600 and the admission was $2 for adults and $0.75 for children, how many

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Answer:

340 children, 210 adults.

Step-by-step explanation:

$Let \ a \ - adults, \ c - children;\\c + a = 450\\0.75c + 2a = 600|\cdot 4\\3c + 8a = 2400;\\\\c + a = 450|\cdot(-3)\\3c + 8a = 2400\\-3c -3a = -1350\\5a = 1050 => a = 210, c = 450 -210 = 340.$