exam Maths Puzzle Numerical Ability

Given f(x)=5x2-3x+1, find f(-2)

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exam Other Question

what is the answer to 25w+w-60w+36 Skip and Laurie paddle a raft 15 miles downstream in 3 hours. On the return trip, they paddle the raft the same distance upstream in 5 hours. Find the rate of the current.