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zhannawk [14.2K]
3 years ago
15

PLEASE HELP I WILL MARK BRAINLIEST

Mathematics
1 answer:
Mice21 [21]3 years ago
7 0

Answer:

180 i think if you are not sure with my ans then just don't use it k bey

Step-by-step explanation:

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What is the radius for the circle given by the equation? 
alisha [4.7K]

Use:

(a-b)^2=a^2-2ab+b^2\qquad(*)

x^2+y^2-6y-12=0\ \ \ \ |+12\\\\x^2+y^2-6y=12\\\\x^2+y^2-2y\cdot3=12\ \ \ \ |+3^2\\\\x^2+\underbrace{y^2-2\cdot y\cdot3+3^2}_{(*)}=12+3^2\\\\x^2+(y-3)^2=21\\\\\boxed{k=3}

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3 years ago
What is the answer to -12=2+5v+2v
katovenus [111]

Answer:

Isolate the variable by dividing each side by factors that don't contain the variable.

v  =  − 2

Step-by-step explanation: No the right answer? Let me know!

7 0
3 years ago
4)
liberstina [14]
Arc length is the angle/360 times circumference. The diameter of the unit circle is 2. So the circumference of the unit circle is 2pi, if you use 3.14 for pi, then the circumference is 6.28. So your equation is
x/360 times 6.28=4.2, divide by 6.28, then multiply by 360
x=240.76432
Your answer rounded to the nearest thousanth is 240.764

6 0
3 years ago
Question 8<br> Calculate the difference (4x2 + x - 5) – (5x2 - 1).
Rufina [12.5K]

Answer:

x - 6

Step-by-step explanation:

(4x2 + x - 5) - (5x2 - 1)

According to the order of operations, parenthesis come first so we will solve what is in the parenthesis first.

Then we do the multiplication because it comes before addition and subtraction.

4x2 = 8

Now we have 8 + x - 5

Combine like terms and 8-5=3 so we have 3 + x

Now for the second one.

5x2=10

10-1=9

Subtracting this from the first expression we have:

3+x-9 =

x - 6

7 0
2 years ago
How many centimeters are in 8 meters?
Law Incorporation [45]

Answer:

800 centimeters.......

3 0
3 years ago
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