exam Maths Puzzle Numerical Ability

Can you help me with this? Thanks!!!....Hint: In exercises 29-42, refer to examples 6 and 7........not sure exactly what to do with this...

5x(x-7) + 3(x-7)

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exam Other Question

How do I make a 15 degree angle from a 90 degree angle only using angle bisectors? This is a compound interest question. Thanks for any assistance.

An initial deposit of $1,000 earnes 9% interest, compounded monthly. How much will be in the account in 4.5 years.

Thanks again for your help.