Twice the sum of a number and 3 is 20

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

How is the number of vertices for a prism related to the name of the prism

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?