Find the equation of a line perpendicular to y=3x+7 that passes through the point (9,-7)

Which pair of angles are vertical angles? ∠1 and ∠4∠1 and ∠2∠2 and ∠4∠2 and ∠3more than one answer.

Find the magnitude of the torque about p if an f = 80-lb force is applied as shown. (round your answer to the nearest whole number.) ft-lb

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number