exam Maths Puzzle Numerical Ability

The coordinates of points in the coordinate plane can be written in matrices where x-coordinates are listed in the first row and the corresponding y-coordinates are listed in the s

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Heres the question:
A farmer wants to buy 100 animals for $100.00 (must buy at least one of them)

Horses-$5.00
Cows-$3.00
Chicks-.50

How many horses,cows and chicks does the farmer need to have 100 and 100.00? Please help setting up formula:

Joey works in the summer at a lake. His boss pays him $24 each day that he takes a fishing party out plus his board. On the days he doesn't tak