Me algebra graphs.
number (24) a, b !

a.  The difference is '0'.

b.  Approximately 120 beats/min

Step-by-step explanation:

Looking at the graph, the woman's heart rate started at 60 beats/min before she began warming up for her workout.  After she completed her cool-down, her heart rate was again at 60 beats/min.  So, 60 - 60 = 0 difference.  

The graph shows the woman's heart rate over time.  Looking at the x-axis (time) at around 8 minutes and moving up the y-axis (heart rate), we can see that after 8 minutes her heart rate was approximately 120 beats/min.

8121 because

130,000 divided by 16 is 8121

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.