A motorist travelled from Ibadan to Lagos a distance of 142km at an average speed of 60km/h. he spent 2 1/2hours in Lagos and then returned to Ibadan at an average speed of 80km/h. At what time did he arrive in Ibadan? What is the average speed of the whole journey?

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

M? aoc=96 ? space, m, angle, a, o, c, equals, 96, degree \qquad m \angle boc = 8x - 67^\circm? boc=8x? 67 ? space, m, angle, b, o, c, equals, 8, x, minus, 67, degree \qquad m \angle aob = 9x - 75^\circm? aob=9x? 75 ? space, m, angle, a, o, b, equals, 9, x, minus, 75, degree find m\angle bocm? bocm, angle, b, o, c:

What is the slope of the line passing through the points (-5, 7) and (-3,5)?