exam Maths Puzzle Numerical Ability

Renee now weighs 118 pounds. This is 80% of what Renee weighed a year ago. How much did Renee with a year ago?

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exam Other Question

Find the x intercepts

y=x^2-2x+4

Thanks for any help could you help me factor completely? i tried where am i wrong?
x^2+2x-80
x^2+160-3x-80
(x^2+160x)-(3x+80)
x^2(x+160)-3(x+80)