9 is what percent of 20?

Idon’t understand! 15 points for whoever answers correctly! write an equation for the lion, and one for the zebra. then, plot the points on an x,y chart going up to 8. plot both points on the

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.