PLS PLS PLS HELP ME DO DIS QUEST ION I WILL GIVE brainiest IF U GET THE ANSWER RIGHT ( also this is worth 50 points!

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.

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.