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gavmur [86]
3 years ago
15

Someone help me. I've been trying to do this one my own. But I just can't.

Mathematics
1 answer:
anzhelika [568]3 years ago
7 0

9514 1404 393

Answer:

  1) x = 4

  2) ? = 20

  8) x = 5

Step-by-step explanation:

Use the applicable relationships to write an equation involving the unknown. Solve the equation.

__

1) We note that the marked arcs are the same length. In a circle, chords that subtend arcs of the same measure are the same length.

  5x -1 = 4x +3

  x = 4 . . . . . . . . . . add 1-4x to both sides

__

2) A tangent meets a radius at right angles. The given triangle is a right triangle, so the Pythagorean theorem applies.

  12² +16² = x²

  144 +256 = x² = 400

  x = √400 = 20

The missing value is 20.

__

8. Tangents from the same point are the same length.

  4x -8 = 12

  4x = 20 . . . . . add 8

  x = 5 . . . . . . . divide by 4

_____

<em>Additional comment</em>

In problem 2, you note the ratio of side lengths is 12 : 16 = 3 : 4. This should give you a clue that this is a 3-4-5 right triangle. The long (missing) side will be 5, scaled by the scale factor of 4, so will be 4×5 = 20.

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Answer:

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Step-by-step explanation:

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6 0
3 years ago
a contractor is building a new subdivision on the outside of a city. he has started work on the first street and is planning for
monitta

The equation of the location of the second street in standard form is

x + y = -6

Equation of the line:

The equation of the line represents the algebraic form of representing the set of points, which together form a line in a coordinate system.

The equation of the line can be formed with the help of the slope of the line and a point on the line.

The general form of the equation of a line with a slope m and passing through the point (x₁,y₁) is given as:

y = mx + b.

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Given,

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The equation of the street is parallel to the equation of the line in the graph, thus they have the same slope.

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solve for b by plugging in (-5,-1)

=> -1 =-(-5) +b

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So, the equation of the location is x + y = -6.

To know more about Equation of the line here.

brainly.com/question/2564656

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Answer:

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