exam Maths Puzzle Numerical Ability

Multiply

8pq^2(2pq-3p+5q)

Thank you, These problems have me so confused.

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exam Other Question

Find an equation of the line having the given slope and containing the given point. Express your answer in the form y=b or y=mx+b.

m=0, (0,-3)

The equation of the line y= ________
How do I solve the following equation?

Linear equations

3x-2y+2z=-30
x+3y-2z=12
3x+2y-z=-6

Thanks for your help,
Zachary