exam Maths Puzzle Numerical Ability

How do you simplify this fraction?

10x^2 - 30x + 20
__________________
x^2 - 1

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exam Other Question

What is the value for for a 98% confidence interval when n=12?

A) 23.053

B) 24.725

C) 25.090

D) 24.278 Find the slope & the y-intercept of the line with the given equation

y=5x-7
y=3

Please help me with this problem

Thanks