One of the roots of the equation 2x^2-bx-20=0 is -2.5. Find the other root.

On a coordinate grid, point p is at (4, 3) and point r is at (−2, −5). points q and s are a reflection of both points across the x-axis. what are the coordinates of q and s? q(−4, 3), s(2, −5) q(4, −3), s(−2, 5) q(−4, −3), s(2, 5) q(−4, 3), s(−2, 5) ; -; i can't figure it out, if someone can me with the answer,that would be nice

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

Three times the sum of a number and seven is negative thirty-six. what is the number?