exam Maths Puzzle Numerical Ability

Write the following expression in simplest form.

ab - 3a + 5b - 15/15 + 3a^2 - 5b - a^2b

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exam Other Question

Write expression in simpliest form

4x - 28/5x - 35 A motorboat can go 8 miles downstream on a river in 10 minutes. It takes 30 minutes for this boat to go back upstream the same 8 miles. Find the speed of the boat in still water.