Aboat goes 4 miles upstream in four hours. it returns downstream to the starting point in two hours .the rate of the boat is x. the rate of the river current is y . find x & y miles per hour

What number should be added to both sides of the equation to complete this square? x^2-10x=7

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Nine more than four times a number is the same as one less than twice the number. find the number?