book Maths Puzzle Numerical Ability

equation problem: please help...

y + 5 = 0
9

(y over 9 + 5= 0)

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book Other Question

If you borrow $100 and pay back $105 at the end of one month, then what is the simple annual interest rate? car travels 57 mph. how many miles does car travel in 3 hours and 40 mins.
how do you convert 40 mins?