Solve by extracting roots. round your answers to two decimal places. 2.8x² = 2x² + 22.1

+/- 5.26

Step-by-step explanation:

Subtract both sides by 2x^2

.8x^2 = 22.1

Divide by .8

x^2 = 27.625

Take the square root on both sides

x = +/- 5.26

It's either a positive or a negative number because the sign doesn't matter when you square the number so we have to account for both possibilities.

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.