PLEASE HELP FOR 25 POINTS. PLEASE EXPLAIN ANSWER Erin works out the same amount of time each day. Some days, he runs 5 miles. Other days, he walks 2 miles. He walks 4.2 mph slower than he runs. Determine how fast he runs and how long his workout takes.

Step-by-step explanation:

15 minutes

Step 1. Set up the long multiplication.

Step 2. Calculate 3 x 5, which is 15.
Since 15 is two-digit, we carry the first digit 1 to the next column.

Step 3. Calculate 6 x 5, which is 30. Now add the carry digit of 1, which is 31.
Since 31 is two-digit, we carry the first digit 3 to the next column.

Step 4.  Bring down the carry digit of 3.

Step 5. Calculate 3 x 4, which is 12.Since 12 is two-digit, we carry the first digit 1 to the next column.

Step 6. Calculate 6 x 4, which is 24. Now add the carry digit of 1, which is 25.
Since 25 is two-digit, we carry the first digit 2 to the next column.

Step 7. Bring down the carry digit of 2.

Step 8. Calculate 315 + 2520, which is 2835

Step 9. Therefore, 63 x 45 = 2835.

2835