exam Maths Puzzle Numerical Ability

Given f(x) = -x3 + 3x2 + x + 7, find f(-3), f(0), and f(1)

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exam Other Question

For a class with 10 students, the daily expenditure on copying is $43.70; for 12 students it�s $51.30. Predict how much money a class of 18 students will need daily for copying. Graph the inequality
3x+y<=5

y=3x+5

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