Emma has been training for a bike race. She recorded her training times in the table below Emma believes that if her average speed is above 15 miles per hour, then she has a good
chance of winning the race. On which day(s) was Emma's average speed over 15 miles per
hour?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Need solving this second acceleration problem.

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2