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2 years ago

PLEASE HELP I DONT KNOW

Mathematics

1 answer:

masya89 [10]2 years ago

7 0

Answer:

30.85

Step-by-step explanation:

circumference of a circle = $2\pi r$

In this case, it's half of that because it's a half circle,

With a diameter of 12, the radius is 6

So, $2\pi 6$ = 37.699 then we diver by 2, so we account for the half circle versus a whole. 37.699/2 = 18.8496.

Then add the 12 that makes bottom line. So 18.496 + 12 = 30.8496

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Aloiza [94]

Answer:

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Step-by-step explanation:

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3 years ago

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Write 9x-3y=-69 x − 3 y = − 6 in slope-intercept form. Make sure you show all steps and inverse operations.Write 9x-3y=-69 x − 3

Goryan [66]

Answer:

y = 3x + 23 and

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Step-by-step explanation:

The first equation is 9x - 3y = - 69 and we have to write it in slope-intercept form.

Now, 9x - 3y = - 69

⇒ 3x - y = - 23 {Dividing both sides by 3}

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Now, x - 3y = - 6

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3 0

2 years ago

JK is formed by J(-12,3) and K(8,-5). If line r is the perpendicular bisector of JK, write an equation for r in slope-intercept

dem82 [27]

Answer:

y = 5/2x + 4

Step-by-step explanation:

Midpoint of JK:

x = (-12 + 8)/2 = -4/2 = -2
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Slope of the line JK:

m = (-5 - 3)/(8 - (-12)) = -8/20 = -2/5

Perpendicular lines have negative reciprocal slopes.

So the line r has a slope 5/2 and passes through the point (-2, -1)

Equation of r:

y = 5/2x + b
-1 = 5/2(-2) + b
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b = 5 - 1
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So the equation is:

y = 5/2x + 4

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3 years ago

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alexandr402 [8]

To solve the question, the both equations should have a positive value and a negative value with same number. Then one variable can be eliminated.

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Or

To eliminate Y term first, we should multiply the first equation by 5 and second one by 6.
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3 years ago

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Answer:

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