How many millimeters of mercury is 2.64 atmospheres equivalent to? 2.01 x 103 mm hg 3.47 x 10−3 mm hg 2.88 x 102 mm hg 2.64 mm hg?

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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?