If all were kids, there would be 20 legs. A horse has 2 more legs than a kid. The extra 10 legs can be attributed to there being 5 horses.
The sales tax was $3.49.
First, you just subtract 69.78 from 100, and you get 30.22. Then you subtract 26.73 from 30.22 and you get 3.49.
Hope that helped!
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The best and most correct answer among the choices provided by the question is </span><span>y^3 + 3y^2z + 3yz^2 + z^3
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Hope my answer would be a great help for you. </span> </span>