exam Maths Puzzle Numerical Ability

A crew rowing with the current traveled 16 miles in 2 hours; against the current, the crew rowed 8 miles in 2 hours. Find the rate at which the crew is rowing in still water and the rate of the current.

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exam Other Question

factor each trinomial. Factor out all common monomials first including -1 if the lead coefficient is negative if a trinomial is prime, so indicate
a^4-13a^2+36 Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible.

(2, -3) and (2, 4)