exam Maths Puzzle Numerical Ability

if a graph of f(x)=-3x2+2x+k passes through the point (-1,3), then the value of k is?

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exam Other Question

Simplify. Assume x represents a positive number

square root of 7x^2 A ship must average 22 knots (nautical miles per hour) to make its 10-hour run on schedule. During the first four hours bad weather caused it to reduce speed to 16 knots. What should its average speed be for the rest of the trip to maintain its schedule?