exam Maths Puzzle Numerical Ability

What's the y-intercept of : 3x - y = -15?

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exam Other Question

Factor trinomials.
2x^2+10x+8
2(x^2+5x+4)
2(x^2+1)(5x+4)
Is this right? The sum of two numbers is 38. Their difference is 10. What are the two numbers?