Answer:
a) -6
b) 9
c) 27
Step-by-step explanation:

first you divide the amount of miles chris walked with 1/4 or .25 miles then you will get the answer
1 white shirt
1 black shirt
1 blue shirt
1 blue pant
1 tan pant
There are 5 total articles of clothing and 2 that he could end up wearing (white shirt & tan pants)
so the probability equals 2/5
Two ratios that are equal to 7:6 are 14:12 and 21:18, as they are the same, but 7 and 6 are multiplied by the same number (2 in the first, and 3 in the second.)