exam Maths Puzzle Numerical Ability

find the position of a vertex for the graph of the function f(x) = x to the second power+6x+7

am desperate!!

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exam Other Question

Dave gets to work in 20 minutes by diriving, and it takes him 45 minutes if he drives. His average diriving speed is 4.5 mph. how far does he travel to work?

What is the slope and y-intercept of y=6x-1?