Heather finished a race in 58.4 seconds, which was 2.6 seconds less than her practice time. Write and solve an equation to find Heather's practice time. Show that your answer is reasonable.

P=58.4+2.6=58+0.40+0.60+2=60+1=61

P=61 seconds.

Practice time P seconds

Timing in the Race : R = 58.4 seconds

Improvement Record I = 2.6 seconds

Race timing = Practice timing - Improvement record

R = P - I

58.4 seconds = P - 2.6 seconds

Take 2.6 seconds to the left hand side, 58.4 sec + 2.6 sec = P

P = 61.0 seconds

Now, subtract improvement record time from Practice time, you get the race time.