Find the length of side accent simplest radical form with a rational denominator

Which equation represents the model shown? a)1/3 divide 1/6 = 2 b)2/3 divide 1/6 = 2/18 c)1/3 divide 1/6 = 1/18 d)2/3 divide 1/6 =4

Which expression is rational? 6. , square root two, square root 14, square root 49

X+y=-4 x-y=2 use elimination with adding and subtraction