exam
Maths Puzzle
Numerical Ability
5x to the second power - 4x + 1 = 0
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exam Other Question
Solve for x
25x^2=13
Having trouble with this one. Thanks in advance.
Bob made an investment- some at 6% and three times as much at 10%. If his total annual investment income was 5400 dollars, how much did he invest at each rate?