Exam Maths Puzzle Algebra

Mary's bowling score was within 10 pins of her average score of 105. I need to express this statement in terms of an inequality involving absolute value. I don't need to solve it. Just find out the inequality.

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Exam Other Question

Given that log b (xy^3)=m and log b (x^3y^2) = p, find log b ([square root] xy) in terms of m and p. The graph of a quadratic function can have 0, 1, or 2 x-intercepts. How can you predict the number of such intercepts without drawing the graph or completely solving the equation?