2 years ago

The radius of a circle is 18 millimeters. What is the circle's circumference?

Mathematics

1 answer:

Tom [10]2 years ago

8 0

Answer:

36 pi or approximately 113.04 mm

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi *r

C = 2 * pi * 18

C = 36 pi

Using 3.14 for pi

C =113.04 mm

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Find the gcf of 12,30,72

kvv77 [185]

Answer: 6

Step-by-step explanation:

12 = 2^2 • 3

30 = 2 • 3 • 5

72 = 2^3 • 3^2

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2 years ago

Mr liston bought lunch for $ 12.80. He gave the waiter a tip of 15 %. How much money did the waiter recieve?

Serga [27]

The answer would be B, because 12.80 times .15 is 1.92

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To figure this out you can do a proportion
34 X
---- = ------
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2 years ago

Which expression is NOT equivalent to 8 . -54?

ivanzaharov [21]

Answer:

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Step-by-step explanation:

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3 years ago

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Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

$a=1\\b=-19\\c=-1$

substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

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$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

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