exam Maths Puzzle Numerical Ability

Larry invested $6000 for one year. He invested part of it at 9% and the rest at 11%. At the end of the year he earned $624 in interest. How much did he invest at each rate?

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exam Other Question

find the center,vertices,foci, and asymptotes of the hyperbola 4x2-y2-8x+2y-1=0 and draw a graph

thanks Please help me with this problem:

[x-(-6+ the square root of 13)][x-(-6)-the square root of 13)] Find the product.

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