exam Maths Puzzle Numerical Ability

Solve the equation:

x^-2 - 15x^-1 + 44 = 0

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exam Other Question

can you help me please? Solve by graphing. estimate answers to nearest half unit if nescessary.
x - 2y = -6
y = -3/2x -1 A school club has 15 boys and 16 girls as members. How many different 6- person communities can be selected from the membership if equal numbers of boys and girls are to be selected?