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170 divided by 11 is the weight of one carrot (15.45), so mulitply that by 20 (309.09) would be the weight of 20 carrots.
Depending on what you prefer, you can either substitute or you can try to solve this by elimination. I'll explain both. 1) x - 2y = 1 2) x2 - xy +y2 = 1 If solving by elimination, yo...
We firstly need to look how to factorise quadratics. (x )(x ) By looking at this, we need 2 numbers that add together to make -1. We need 2 numbers that multiply to make -6. To multiply to make -6, ...
To explain this question to a student, I would initially ask my own questions in order to gain an understanding of what the student already knows about simultaneous equations. I would ask if they had seen...
7.42-2.92=answer2
square root above answer to get the answer
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