1. in round 2, zoey had a total of 23.43 points. she got a score
of 7.96 in level 2 and a score of 8.03 in level 3.
part a
✓ 7
24.3
t
25.0
what score did she receive in level 1?
87.0
part b.

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Ответ:

destanybrunson

26.12.2022

Mathematics

$\frac{-4xy}{x^2-y^2}$

Step-by-step explanation:

$\frac{x-y}{x+y}-\frac{x+y}{x-y} \\\\\\=\frac{(x+y)(x-y)}{(x-y)(x-y)} -\frac{(x+y)(x-y)}{(x+y)(x+y) } \\\\= \frac{(x-y)(x-y)-(x+y)(x+y)}{(x+y)(x-y)} \\\\=\frac{x^2-xy-xy+y^2-x^2-xy-xy-y^2}{(x+y)(x-y)} \\\\=\frac{-4xy}{(x+y)(x-y)} \\\\=\frac{-4xy}{x^2 - y^2}$

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1. in round 2, zoey had a total of 23.43 points. she got a scoreof 7.96 in level 2 and a score of 8.03 in level 3.part a✓ 724.3t25.0what score did she receive in level 1? 87.0part b.