exam Maths Puzzle Numerical Ability

Hi, can I have some help with the following problem?

Sketch the graph of the given parabola and state the coordinates of its vertex and its intercepts.
y = 8x^2 + 5x
( , ) (v

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exam Other Question

Find the slope of the line 3y+8=0 Given A =
3 -2 0
1 4 2
-1 5 -3

find -3A.

Thank you for your help