exam Maths Puzzle Numerical Ability

Find the work done by the constant force 4i - 2j if the point of application moves along the line segment from P(1,1) to Q(5,7).

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Please help me solve for a for this equation: {{{ 7.5a+.5b-3.5c=6.5 }}} {{{ 2.5a-3b+4c=5 }}} {{{ 1.5a-5b+2c=-11 }}} in basketball you score 2 points for a basket and 1 point for a free throw. suppose you scored no more than 15 points in agame. how many baskets and free throws could you have mad