The folding chair has different settings that change the angles formed by its parts. suppose angle 2 is 31 and angle 3 is 72. find the measure of angle 1.

103°

Step-by-step explanation:

Consider triangle with angles 2, 3 and supplementary angele to angle 1.

In this triangle, angles 2 and 3 are interior angles, angle 1 is exterior angle opposit to two given interior angles.

Exterior Angle Theorem: The exterior angle of the triangle is equal to the sum of the two opposite interior angles.

Since

by exterior angle theorem

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:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.