Find the value of x in the following figure. Note: The figure is not drawn to scale. x = _a0°

x= 40

Step-by-step explanation:

The sum of the angles in a triangle is 180

75+ 65+ unknown = 180

140 + unknown = 180

unknown = 180- 140

unknown = 40

unknown = x because they are vertical angles and vertical angles are equal

40 =x

x = 40

Step-by-step explanation:

Angles in a triangle add up to 180 degrees.

Let y be the missing angle.

75 + 65 + y = 180

y = 180 - 75 - 65

y = 40

Vertically opposite angles are equal.

x = y

x = 40

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

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