If a given solution has a 10 percent solute concentration, and more solvent is added, the new solute concentration could be:

50%

25%

10%

5%

x+y=90

x=30-y=x

step-by-step explanation:

if you understand you will get the answer

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.