exam Maths Puzzle Numerical Ability

Lane invested $10,000 part at 15% and part at 14% If the total interest at the end of the year is 1,430, how much did she invest at 15%?

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exam Other Question

Hello,
solve and how to determine if the system is independent, inconsistent or dependent:

y = 3x - 5
y = 3x +2

thks!
Two cities on a map are 5.5 inches apart. The cities are actually 198 milles apart. What was the scale used to draw the map?