Final answer:
Roberto needs to walk 9/8 miles, or 1 1/8 miles, on the second day to finish picking up trash around his block.
Step-by-step explanation:
The question asks how far Roberto needs to walk on the second day to clean up trash if the total distance around his block is 1 3/4 miles and he already walked 5/8 of a mile on the first day.
To find out the remaining distance Roberto needs to walk, we first convert the mixed number to an improper fraction. The total distance around the block in miles is:
1 3/4 miles = (1 × 4 + 3)/4
= 7/4 miles.
Now we subtract the distance walked on the first day:
7/4 miles - 5/8 miles = (14/8 - 5/8) miles
= 9/8 miles.
Therefore, Roberto needs to walk 9/8 miles, or 1 1/8 miles, on the second day to complete the cleanup around his block.