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Dafna1 [17]
3 years ago
12

12. Find x. (x + 20)° (5x - 8)°​

Mathematics
1 answer:
ololo11 [35]3 years ago
8 0

Answer:

<h2>x = 7</h2>

Step-by-step explanation:

Simplifying

x + 20 = 5x + -8

Reorder the terms:

20 + x = 5x + -8

Reorder the terms:

20 + x = -8 + 5x

Solving

20 + x = -8 + 5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5x' to each side of the equation.

20 + x + -5x = -8 + 5x + -5x

Combine like terms: x + -5x = -4x

20 + -4x = -8 + 5x + -5x

Combine like terms: 5x + -5x = 0

20 + -4x = -8 + 0

20 + -4x = -8

Add '-20' to each side of the equation.

20 + -20 + -4x = -8 + -20

Combine like terms: 20 + -20 = 0

0 + -4x = -8 + -20

-4x = -8 + -20

Combine like terms: -8 + -20 = -28

-4x = -28

Divide each side by '-4'.

x = 7

Simplifying

x = 7

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Step-by-step explanation:

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For each situation below, write the equation of the line and explain how you can tell.
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Answer:

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Step-by-step explanation:

a. Has a slope of 2 and passes through (10,17)

Using the slope intercept form

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Substitute the point into the equation

17 = 2(10)+b

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Subtract 20 from each side

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First find the slope

m= (y2-y1)/(x2-x1)

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y = -x+b

Substitute a point into the equation

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Add 1 to each side

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6 0
3 years ago
What is the length of arc S?<br> (The angle in the figure is a central angle in radians)
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Step-by-step explanation:

equation: <em>length of the arc = ∠of the angle/360 * circumference</em>

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Answer:

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Step-by-step explanation:

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