Help with this marking brainless to you guys!

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

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.

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)