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2 years ago

5(1+4K)+7k=4(7k+2) Help

Mathematics

1 answer:

stepladder [879]2 years ago

5 0

Answer:

k = -3

Step-by-step explanation:

1) Simplify

5+20k+7k=28k+8

2) Combine the k's

5+27k=28k+8

3) Subtract 27k on both sides

5=k+8

4) Subtract 8 on both sides

-3=k or k= -3

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NemiM [27]

Answer:

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Step-by-step explanation:

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3 years ago

What is the radius of a circle in which a 30° arc is 2π inches long?

son4ous [18]

First of all, let's recall that the full circumference is

$C = 2\pi r$

Now, since 30 is one twelfth of 360, a 30° arc will be one twelfth of the whole circumference. So, if you call the arc length A, you have

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3 years ago

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katrin2010 [14]

Answer:

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Step-by-step explanation:

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3x+9 + 9x - 9 =180

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3 years ago

What is the median for 9, 37, 39, 13

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Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

Give the equation of the circle centered at the origin and passing through the point (0,-8)

Norma-Jean [14]

Answer:

The answer to your question is x ² + y² = 64

Step-by-step explanation:

Process

1.- Find the length of the radius

C (0, 0)

P (0, -8)

d = $\sqrt{(x2 - x1)^{2}+ (y2 - y1)^{2} }$

d = $\sqrt{(0- 0)^{2}+ (-8 - 0)^{2} }$

d = $\sqrt{64}$

d = 8

2.- Find the equation of the circle

$(x - h)^{2} + (y - k)^{2} = r^{2} \\$

h = 0 and k = 0

$(x - 0)^{2} + (y - 0)^{2} = 8^{2}$

x² + y² = 64

5 0

3 years ago