You plug in $67 for y because you need to find out what week you'll have $67 dollars in the account.
Let s be the distance traveled the second day.
1.5s+s=1380
2.5s=1380
s=552
So on the first day he traveled 1380-552=828 miles.
Answer: 3
Step-by-step explanation:
Move the decimal back to its point of origin
Put the numbers in order
6,7,15,36,41,43,47,49
Q1 = (7 + 15) / 2 = 22/2 = 11 <== first quartile
Q2 = (36 + 41) / 2 = 77/2 = 38.5 <== median
Q3 = (43 + 47) / 2 = 90/2 = 45 <== third quartile
difference of largest value and median.....(49 - 38.5) = 10.5