Whats xyz 1-rf14 and she wants 900 back

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.