Determine the value of the variable in the simplified expressions. What is the value of x in this simplified expression? (Negative j) Superscript negative 7 = StartFraction 1 Over (negative j) Superscript x EndFraction x = What is the value of y in this simplified expression? k Superscript negative 5 + m Superscript negative 10 = StartFraction 1 Over k Superscript y EndFraction + StartFraction 1 Over m Superscript 10 EndFraction y =