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While pronouncing 't' in English,your tongue touches the down side of your gum. The opposite happens when you pronounce 't' in Chinese. Your tongue is supposed to push against the upper side of your gu...

I would ask the student what they understood of percentages and if they understood the relationship between fractions and percentages. I would explain that 1% of a value is the same as 1/100 of a value...

I would first get the student to find the elements on the Periodic Table, and work out how many valence electrons each atom had. Then I would get them to draw the structures of hydrogen and chlorine us...

x² + y² + 10x + 2y - 4xy = 10

Start by differentiating both sides by x, the terms not containing y are differentiated normally, x² becomes 2x, 10x becomes ...

As distance is equal to speed multiplied by time, the distance Paul has traveled is 90 multiplied by T, or 90T.
As Mary is making the same journey, she travels the same distance. The distance she...