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3 years ago

A circle has the equation x2+y2+16y−30x=0.

Mathematics

1 answer:

taurus [48]3 years ago

6 0

Answer:

Step-by-step explanation:

hello :

x2+y2+16y−30x=0 means : (x²-30x)+(y²+16y) =0

(x²-30x+15²)-15²+(y²+16y+8²) -8²=0

(x-15)²-225+(y+8)²-64=0

(x-15)²+(y+8)²=289=17²......standard form when the center is (15,- 8)

and radius 17

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What is the circumference of a circle whose diameter is 20?

Sergeeva-Olga [200]

Answer:

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Step-by-step explanation:

Use the formula C=πd

Plug in 20 for d and simplify

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So, you round it to 62.83

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3 years ago

What is the rational number equivalent to 3 point 12 with a bar over 12?

slamgirl [31]

$\frac{12}{100}=0.12$

To get the 0.12 to repeat, the trick is to subtract 1 from the denominator

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4 years ago

Read 2 more answers

A bicycle wheel with diameter 16 inches rides over a screw in the street. The screw is on level ground before it

34kurt

Answer:

16 inches

Step-by-step explanation:

Note: it should say 56π inches instead of 56 inches otherwise no option is correct

Given

Diameter of the wheel = 16 in

Full circumference of the wheel

C =πd = 16π

Bike moves

56π

The wheel turns:

56π /16π = 3.5 times

We only consider her 0.5 of full turn of the wheel to identify the screw position

Since we consider the turns from the ground level as the initial position of the screw, the screw position in the end will be half turn opposite to ground level.

This is the full diameter length, which is 16 inches

So correct answer option is 16 inches

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3 years ago