Positive acceleration indicates an increasing velocity while negative acceleration (deceleration) indicates slowing down.

X + y = 270 x - y = 26 Add the two equations:   2x = 296   x = 148 Substitute this value of x back into either of the original equations and solve for y: 148 + y = 270   y = 122 An ordered pair might be (148, 122)

To figure this out use a common denominator for the fractions: 1/6 = 4/24 1/8 = 3/24 Therefore, 1/6 > 1/8

X² + 4x - 12 = 0 (x + 6)(x - 2) = 0   x - 2 = 0   x + 6 = 0   x = 2   x = -6