6. Mackenzie ran a half marathon (13 miles) in 1 hour and 57 minutes. She kept up a pace of 8 minutes per mile for the first 7 miles. Then the course got hilly, so for the next 4 miles, she ran 11 minutes per mile. If she
finished up the course at a consistent pace, what was her rate for each of the last miles?

See this clearly means that the interstate is that her rate for each of the last miles is 21

Solve  each factor that was set equal to zero by getting the x on one side and the answer on the other side.  step  1: write the equation in the correct form. in this case, we need to set the equation equal to zero with the terms written in descending order.step  2: use a factoring strategies to factor the problem