book Maths Puzzle Numerical Ability

IF f(x) -5x-1, find the following
f(a-2)

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book Other Question

Complete the ordered pairs so that each is a solution to the given linear equation. Present your answer as an ordered pair. 3x - 2y = 12

(a) (-4,?) (b) (?-3) translate"the sum of five times the square of y and the square of x into a mathematical expression.