Step-by-step explanation:
Since we have given that
Number of hour Marco practiced the piano on Monday is given by

Number of hours Marco practiced the piano on Tuesday is given by

1) For Adding :
Total number of hours he practiced on both Monday and Tuesday will be

2) For Subtraction,
Number of hour he practiced more on Tuesday than on Monday will be

Answer:
7, 80 ,30, 76, 87
Step-by-step explanation:
Answer:
i think G
Step-by-step explanation:
Make two equations from the information. Then graph them and see where they intersect. The answer is 62 miles. Plug 62 back into both equations and they should both be the same number.
The answer is 101 because you add 89 and 12