exam Maths Puzzle Numerical Ability

A total of $8000 is invested , part at 3% and the rest at 4% per year. If the annual return on theses investments is $275, how much is invested at each rate?

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exam Other Question
what does it means by: dtermine wheather each graph represents Y as a function of X Can someone help me on this problem?

I need to add: 3/11 + 9/11 + 1/11 in the simplest form.

Thanks,
Sher