What is the slope of the equation y - 5 = -7( x + 9)

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

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%

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?