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Alex73 [517]
4 years ago
10

Pls help me out!! lol

Mathematics
1 answer:
Solnce55 [7]4 years ago
6 0

Option D: y=-\frac{1}{2} x+4 is the equation of line

Explanation:

The equation of the line is perpendicular to the line y-12=2 x-8 and that passes through the point (2,3)

We need to determine the equation of the line.

First, let us determine the slope of the equation.

Since, the equation is perpendicular to the line y-12=2 x-8, the slope is m=2

Since, the lines are perpendicular, we have,

m=-\frac{1}{2}

Now, we shall substitute the slope m=-\frac{1}{2} and the point (2,3) in the slope - point formula, we have,

y-y_1=m(x-x_1)

y-3=-\frac{1}{2} (x-2)

y-3=-\frac{1}{2} x+1

Hence, writing this equation in slope - intercept form, we have,

y=-\frac{1}{2} x+1+3

y=-\frac{1}{2} x+4

Thus, the equation of the line is y=-\frac{1}{2} x+4

Therefore, Option D is the correct answer.

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<h3>Answer: Choice D)  31.2 miles</h3>

This value is approximate.

============================================================

Explanation:

Let's focus on the 48 degree angle. This angle combines with angle ABC to form a 90 degree angle. This means angle ABC is 90-48 = 42 degrees. Or in short we can say angle B = 42 when focusing on triangle ABC.

Now let's move to the 17 degree angle. Add on the 90 degree angle and we can see that angle CAB, aka angle A, is 17+90 = 107 degrees.

Based on those two interior angles, angle C must be...

A+B+C = 180

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149+C = 180

C = 180-149

C = 31

----------------

To sum things up so far, we have these known properties of triangle ABC

  • angle A = 107 degrees
  • side c = side AB = 24 miles
  • angle B = 42 degrees
  • angle C = 31 degrees

Let's use the law of sines to find side b, which is opposite angle B. This will find the length of side AC (which is the distance from the storm to station A).

b/sin(B) = c/sin(C)

b/sin(42) = 24/sin(31)

b = sin(42)*24/sin(31)

b = 31.1804803080182 which is approximate

b = 31.2 miles is the distance from the storm to station A

Make sure your calculator is in degree mode.

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