exam Maths Puzzle Numerical Ability

Solve the system by addition.

2x + 4y = 3
4x - 2y = 1

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exam Other Question

my problem is I need to find the domain and range for f(x)=The Square Root of
25-(X^2)....all terms are under the square root symbol. ALSO where can I see if its increasing or decreasing? determine whether each relation is a function
y=3x+2y