exam Maths Puzzle Numerical Ability

jan had $248.10. she gave 8% to jill. how much did she give?

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exam Other Question

3x + 5y = 20
5x - 3y = -3 Maximize z= 14x+22y subject to:
2x+2y> or equal to 20
8x+5y< or equal to 40
x> or equal to 0, y> or equal to 0
The linear programming has a what type of solution?