exam
Maths Puzzle
Numerical Ability
A certin sum of money is invested at 10%. Twice that amount is invested at 8%. The total amount of intrest from both investments is $91. How much is invested at 8%.
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exam Other Question
A patrol plane flies 220 miles per hour in still air. It carries fuel for 4 hours of safe flying. If it takes off on patrol against a wind of 20 miles per hour, how far can it fly and return safely?
can someone help me to perform operation and simplify if possible I also need to know how to set it up
6/x+5 - 4/x-5