exam Maths Puzzle Numerical Ability

find vertex and intercept coordinates of the following
a=b^2-6b-16

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exam Other Question

Can someone help me on this problem?

I need to find the slope and the y-intercept.

y = x

Thank you,
Sher an air rescue plane averages 300 miles per hour in still air. It carries enough fuel for 5 hours of flying time. If, upon takeoff it encounters a head wind of 30 mi/hr and the wind remains constant, how far can the plane fly and then return safely.