What is an equation in point-slope from for the line perpendicular to y=-4x-5 that contains (-9,3)

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

Find the nonpermissible replacement for binthis expression. b2/5b +5

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?