Answer:
-15 plus or minus the square root of 65 all over 4 (All over means fraction)
Since the number of days in July and in August is the same, there is no need to work out on the total number per month.
The mean number of people per day in August = 160 + 20 = 180
Answer: 180
Step-by-step explanation:
By the formula of slope, we have
