exam Maths Puzzle Numerical Ability

Find equation of each line in form of Y=MX+b

The line thru 3,2 and orgin

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exam Other Question

Given the standard form for a conic section.

{{{{ax^2+by^2+cxy+dx+ey+f=0 and the values a=-5 b=0 c=0 d=16 e= -4 f= -12}}}}
Rewrite the equation in standard quadratic form.
If I increase my usual driving speed by 10 km/h, I can drive the 255 km trip to Nashville in 24 min less than usual. How fast do I usually drive?