EXTRA POINTS! volume of spheres.

Plz which expression is equivalent to the expression below?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9