book Maths Puzzle Numerical Ability

If P is the midpoint of segment AB, find the coordinates of the missing point

P(1.2, 4.5) B(5.3, 1.9) I cannot figure this one out. Can you please help me? Thanks

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book Other Question

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 1/2 hours. How quickly can all three fill the pool together?

How do you solve this? Hi There!

I really need help understanding Factoring with a Zero Product. Could someone please explain this problem to me?

-2x^2 -2x + 24=0

Thanks to all