Let

be the amount of time it takes to perform an arm routine and

be the amount of time it takes to perform an abdominal routine. We see:


Subtracting the second equation from the first gives

. Substituting gives

, so

and

.
Thus, an arm routine takes ten minutes and an abdominal routine takes thirty minutes.
Answer:
59.08
Step-by-step explanation:
The lease common multiple of the set of numbers is 108.
108/4=27.
108/27=4.
108/12=9.
9•44=396
396/54=7.3 repeating
Therefore y=7.33