exam Maths Puzzle Numerical Ability

A person is at the top of a poplar tree that is 60 feet high. A lion is on the ground at the foot of the tree. The teacher descents 1/2 ft each day but at night climbs back up 1/6

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Write an equation of the line.

(-5,-3) Please help.
A zebra can run 15 mph faster than an elephant. A zebra can run 8 miles in the same time that an elephant can run 5 miles. Find the speed of each animal.