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Like in English, to form the past tense, we need o  1) The person (I) o  2) An auxiliary verb (have) o  3) Past participle (eaten)
·     Most verbs take ‘avoir’ as their auxiliary verb, so like ‘j’<...

Rearrange the second equation (or first) in terms of y (or x) y = 2-xthen subsitute into the other equation 3x + (2-x) = 4The solve for x : 2x = 2 x = 1then subsitute that value for x into any equation an...

Animal and plant cells share many similarities. For example, they both have: a nucleus, which houses the genetic material; a cytoplasm, where the chemical reactions of the cell occur; a cell membrane, whi...

x² + 4x + 3 is a quadratic equation. We're looking for a pair of numbers that add to make 4, and multiply together to make 3. Students should be encouraged to try options (e.g. 2 and 2).
T...

An ad valorem sales tax is a percentage tax on the market price of good, normally paid for by the seller. This tax will pull the supply curve up towards the top left corner of a supply and demand curve, w...