exam Maths Puzzle Numerical Ability

Simplify this question: 4+|3-1|

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exam Other Question

Multiply and Simplify:

x^5y^3/x^2+13x+30 times X^2+2x-3/x^7y^2 Solve the system of equations by graphing. Then classify the system consistent or nonconsistnt, and the equations dependent or independent.
3x - 9y = 54
2x - 6y = -2
Will aomeone help me please?? Thank you.