Simplify the rational expressions.
x² – 16/x2+6x+8

What is the exact area of a circle with a diameter of 50 centimeters? a.87.9 square centimeters b.379.9 square centimeters c.1962.5 square centimeters d.4923.5 square centimeters

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.