exam Maths Puzzle Numerical Ability

Tell wether the ordered pair is a solution of the linear system.

(1,-1);
2x - y = 3
4x + 2y = 2

Any help with this equation would be Greatly</b> appreciated.

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exam Other Question

Find the Inverse of the following function:

f(x)=10^(x-3)+4
I have the worst problem with graphing and need help please.
Graph the system of inequalities.
y is > than or equal to -4.
x is > than or equal to 5.
Thank so much.