exam Maths Puzzle Numerical Ability

the question states find line ab if a(2,3,4) + B(7,6,5)

I have tried pythagoream theorem but that didnt seem to work other than that i just could not understand the queston

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exam Other Question

using number lines from-5 to 15 draw mapping diagrams to illustrate the functions x arrow 3x + 2 and x arrow4x-3 With Current, a motorboat travels 60 mi in 3 h. Against the current, it takes 2h longer to travel 60 mi. Find the rate of the current.