exam Maths Puzzle Numerical Ability

how do i graph this on a cordinate plane.?
4x < -20

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exam Other Question

A die is rolled twice. find the probability
can you also try to explain it a litte?
Thanks Ken makes a 4 mile motorboat tri downstream in 20 minutes (1/3hr)The return trip takes 30 minutes (1/2 hour). Find the rate of the boat in the water and the rate of the current.