3 years ago

100+500-355+287-311=? A. 22 B. 222 C. 223 D. 931

Mathematics

1 answer:

Ainat [17]3 years ago

5 0

Answer:

Step-by-step explanation:

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Find an equation in rectangular coordinates for the cylindrical equation r = 2sintheta

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Answer:

$x^2+(y-1)^2=1$

Step-by-step explanation:

The given cylindrical equation is

$r=2\sin \theta$

Multiply both sides by r.

$r^2=2r\sin \theta$ .... (1)

The required formulas are

$x=r\cos \theta,y=r\sin \theta,r^2=x^2+y^2$

Substitute $r\sin \theta =y,r^2=x^2+y^2$ in equation (1).

$x^2+y^2=2y$

$x^2+y^2-2y=0$

Add 1 on both sides.

$x^2+(y^2-2y+1)=1$

$(x-0)^2+(y-1)^2=1^2$ $[\because (a-b)^2=a^2-2ab+b^2]$

It is the equation of a circle centered at (0,1) with radius 1.

Therefore, the equation in rectangular coordinates is $x^2+(y-1)^2=1$ .

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3 years ago

Lin rode her bike 2 miles in 8 minutes. She rode at a constant speed. Complete in the table for A to show the time it took her t

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Answer:

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Step-by-step explanation:

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aksik [14]

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12) Josh has $252 in his bank account. This is $12 more than 6 times the amount of money

OLga [1]

Answer:

Step-by-step explanation:

(252-12)/6=40

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