What is the equation of the line perpendicular to y=1/2x+6   that passes through the point (4, 1)? y=-2x+9 y=-1/2x+3 y=1/2x-1 y=2x-7

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

If sin(x) = 0 and cos(x) = 1, what is tan(x)?