exam Maths Puzzle Numerical Ability

Solve each of the following systems by the elimination method
1/4x - 1/6y = -2
-1/6x + 1/5y = 4

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exam Other Question

find the axis of symentry of the parabola defined by the given quadratic function.

f(x)= x^2+5 Please help me to solve:
Use a proportion to solve this problem:

44) If four out of five doctors prefer fast food, then at a fast food convention of 445 doctors, how many prefer fast food?

Thank you for your help!