Tunny a VS Siny value
What is the value of x if (13, 84, x) is a Pythagorean triple?
Ο85
Ο86
Ο94
Ο97

85

Step-by-step explanation:

Pythagorean Triples obeys the Pythagoras Theorem.

We want to find is the value of x if (13, 84, x) is a Pythagorean triple.

We apply the Pythagoras Theorem to obtain:

We simplify to get:

Take positive square root;

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:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0