exam Maths Puzzle Numerical Ability

Kackie Smith won $60,000.00 in a slot machine in Las Vegas. She invested part at 2% simple interest and the rest at 3%. She earned a total of $1600.00 in interest. How much was invested at each rate?

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Write the equation of the line passing through each of the given pair of points. Write your result in slope-intercept form, where possible.

(2,-3) and (2,4) in 1990,the life expectancy in males in a certain country was 63.1 years.in 1996 it was 65.4 years.let E represent the life expectancy in year t and let t represent the numbers si