book Maths Puzzle Numerical Ability

Using the point-slope formula, what is the equation of the line that passes through the points (1,5) and (0,0)? This is a multiple choice A. y=5x B.y=5x-1 C. y=x D. y=5x+10

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book Other Question

x^3-3x^2+3x-9=0

answer can also include complex numbers
Suppose you invest $12,000 in two funds paying 10.5% and 13% simple interest. The total annual interest is $1447.50. How much is invested in each fund?