exam Maths Puzzle Numerical Ability

Given f(x) = 5x2 - 3x + 1, find f(-2)

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exam Other Question

What is the slope intercept form of 7x+7y=14? Miss Santos invested half of her money at 1% and half at 8% per year. Her annual income from the two investments was 7,500 pesos. How much did she invest at each rate?