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sophia rode her bike at an average speed of 9 miles per hour for 3 hours. rose rode her bike at an average speed of 8 miles per hour for 2 hours.
which explanation correctly tells how to calculate how many more miles sophia rode her bike than rose?
a.
step 1 divide: 9 ÷ 3.
step 2 divide: 8 ÷ 2.
step 3 add the two quotients.
b.
step 1 divide: 9 ÷ 3.
step 2 divide: 8 ÷ 2.
step 3 subtract the two quotients.
c.
step 1 multiply: 9 × 3.
step 2 multiply: 8 × 2.
step 3 add the two products.
d.
step 1 multiply: 9 × 3.
step 2 multiply: 8 × 2.
step 3 subtract the two products.