book Maths Puzzle Numerical Ability

How do you find the domain for a question like y = one over x + 2

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book Other Question

Can you help me solve the inequality:
x^2<10-3x
Thank you i think i'm in the right place. this is a problem my daughter and I have worked on. given a line segment RW, point T is midpoint of RS, W is midpoint of RT, Z is midpoint of WS. L