exam Maths Puzzle Numerical Ability

Could you help me factor out 30a+am-am^2 Would 30a-am be a good start? thanks,tyler

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exam Other Question

please help

FInd the product :

-5a^2(a^2-6a+7) Write the proportion 5 is to 8 as 15 is to 24.

Would the answer to this be 5/8 = 15/24 ? Help please.