exam Maths Puzzle Numerical Ability

What is the value of f(-3) for the function f(x)=4.7x+1.6?

A. -18.3 B. -15.7 C. -12.5 D. 15.7

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exam Other Question

30x^3 y^4
6x^9 y^-4
EXPRESS 10/3 - 5/2 AS A SIMPLIFIED RATIONAL NUMBER.