1) 6/31*
Is a rational or irrational

Rational

Step-by-step explanation:

Because irrational numbers cannot be expressed as a fraction

+/- 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.