exam Maths Puzzle Numerical Ability

Given -x^2-6x-3, is the vertex a maximum or minimum for the function? What is the value fo that maximum or minimum?

There is nothing in my book about maximums and minimums, please help!

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exam Other Question

for each pair of equations, determine if the lines are parallel, perpendicular, or neither.

y-3x=10 and 3y+x = -5

I have no idea how to start. Thank you. Can someone help me on this equation?

I need to complete the ordered pair so that each is a solution for the given equation:

3x + 4y = 12

pair 1 is= (,3/4)
pair 2 is= (,0)

Thanks,
Sher