S = 12a
s represent number of student
a represent number of adult
The original median is the number in the middle of 60, 70, 80, 80, 100, so the median is 80.
the new median is the number in the middle of 0, 60,70,80,80,100, the median is between 70 and 80, so it is 75
the original mean is (60+70+80+80+100)/5=78
the new mean is (0+60+70+80+80+100)/6=65
so the mean decreases more than the median. C is the answer. <span />
Your answer is A. You literally plug in the numbers for a and b to solve for the equation.
Answer:
Step-by-step explanation:
-5t ≥ 70
t ≤ -14
