exam Maths Puzzle Numerical Ability

Solve the system by addition.

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

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exam Other Question

what is the domain and range of these (1,2)(3,4) (5,6) (7,8) (9,13) well is it a function state range or domain I am stuck on correct answer for:

one of the factors of x^2 + x - 6 is:

I believe the answer is x + 3, am I correct? If not, what is correct answer?

I am not using any specific book. I am just practicing...