exam Maths Puzzle Numerical Ability

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Solve the following system by addition.

2x + 5y = 10
5x - 2y = 10

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exam Other Question

Please expain how to do this

Let f(x) =x3 -8x2 + 17x -9. Use the factor theorem to find other solutions to f(x)- f(1) = 0, beside x =1.
hello

solve by graphing to show independent, inconsistent or dependent:


2x - 3y = 12
3y - 2x = -12

tks!