book Maths Puzzle Numerical Ability

can you tell me how to do slopes please!!!

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book Other Question

in the right triangle below, the measure of ,<c is 90, ab=5 units, and cb=2 units. what is tan b The smaller of two pipes takes 5 hours longer to fill a tank. If both pipes are used, the job can be done in 3 1/3 hours. How long will it take each pipe to fill the tank alone?