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yan [13]
3 years ago
5

Find the circumference of a circle whose radius is 15.4cm 

Mathematics
2 answers:
LenaWriter [7]3 years ago
6 0
r=15,4\ cm\\C=2\cdot\ \pi\ \cdot\ r\\C=2\cdot\ \pi\ \cdot\ 15,4\ cm\\C=30,8\ \pi\ cm

\pi\approx\ 3,14

C=30,8\ \cdot\ 3,14\ cm\\C=96,712\ cm


rodikova [14]3 years ago
4 0
Π = 3,14

c = 2.π.r
c = 2.3,14.15,4
c ≈ 96,7
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Answer:

(0, e-1) or (0, 1.718) to the nearest thousandth.

Step-by-step explanation:

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3 years ago
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The roots are 1 +√7 and 1 -√7.

<h3>What is Quadratic equation?</h3>

A quadratic equation in the variable x is an equation of the form ax² + bx + c= 0, where a, b, c are real numbers, a≠0

Given equation:

y= x²+2x-6

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Half the coefficient of x and add and subtract the square of (b/2)

y= x²+2x-6+(1)²-(1)²

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7 0
2 years ago
5a - 9 + a = 9
Ne4ueva [31]

Answer:

a = 3

Step-by-step explanation:

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6a - 9 = 9

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4) Divide both sides by 6.

a =  \frac{18}{6}

5) Simplify 18/6 to 3.

a = 3

Therefor, the answer is, a = 3.

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