3 years ago

What is the answer to -3x - 6+ (-1)

Mathematics

2 answers:

erik [133]3 years ago

7 0

Answer:

-3x - 7

Step-by-step explanation:

IrinaK [193]3 years ago

6 0

Answer:

-3x-7

Step-by-step explanation:

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AlekseyPX

Answer:

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3 years ago

Find a cartesian equation for the curve. r = 9 sin(θ)

Paul [167]

For this case we have the following equation:
r = 9 sin (θ)
In addition, we have the following change of variables:
y = r * sine (θ)
Rewriting the equation we have:
r = 9 sin (θ)
r = 9 (y / r)
r ^ 2 = 9y
On the other hand:
r ^ 2 = x ^ 2 + y ^ 2
Substituting values:
x ^ 2 + y ^ 2 = 9y
Rewriting:
x ^ 2 + y ^ 2 - 9y = 0
Completing squares:
x ^ 2 + y ^ 2 - 9y + (-9/2) ^ 2 = (-9/2) ^ 2
Rewriting:
x ^ 2 + 1/4 (2y-9) ^ 2 = 81/4
4x ^ 2 + (2y-9) ^ 2 = 81
Answer:
The Cartesian equation is:
4x ^ 2 + (2y-9) ^ 2 = 81

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3 years ago

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3241004551 [841]

Consider for each point how far it is above (or below) the horizontal line y=2. Then plot its image the same distance below (or above) that line.