Between 8 am and 3 pm on a summer day, the outdoor temperature increased by 23. Between 3 pm and 10 pm, the temperature decreased by 23. What was the net change in temperature from 8 am to 10 pm?

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2