exam Maths Puzzle Numerical Ability

State the domain of the following

m(x)= 5/x^2+9

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exam Other Question

For the input-output matrix A, find the output required to meet the demand D.

A=[0.2|0.4]
[0.3|0.6]

D= [700]
[400] The total score on 3 tests in math, physics, and biology was 290. The score in physics was 1/2 the score in biology. The score in math was ten less than in bio. Find the scores.