Shiela is 0.61 meters taller than her son.
30 ounces of water for 5 teaspoons of lemon
In the step after -6x+10=4x+20, he moved the terms incorrectly. you have to add 6x to both sides so it would be 10=4x+6x+20 which simplifies to 10=10x+20. subtract 20 from both sides to get -10=10x. divide both sides by 10. the answer is x=-1
Radius equals: 4.51
hope this helps! ♥