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As we are told the number of girls that are in the school, our first step should be to calculate the number of boys in the school through a simple subtraction (1200-575 = 625). After this we are told that...
X+2/5X = 63 or 63 = 140%
First we need to understand that the original price (X) has been increased by 40%. Hence, by 2/5 (40/100 = 40%) of its original value, in other words, 2/5X.
To find ...
Notice that the square root of 8 can be simplified: 4 / (sqrt(4) * sqrt(2) + 4) = 4 / (2 * sqrt(2) + 4) Divide top and bottom of the fraction by two: 2 / (sqrt(2) + 2) Rationalise the denominator: (2 / (s...
Well, consecutio temporum probably is one of the thoughest concepts to deal with for italian foreign learners. As the world says, consecutio temporum means "time consequence". With this we mean ...
A + B -----> AB In the chemical reaction above, reactant A reacts with reactant B to form product AB. However, it is a common misconception that this reaction only goes in the forward direction (which ...
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