The mean is the average of the numbers.
It is easy to calculate: add up all the numbers, then divide by how many numbers there are.
Let the number of sit-ups you have to do Sunday be x. Then the sum of all sit-ups is
100+65+120+150+90+0+x=525+x.
The number of days is 7.
Thus, the mean is

You know that the mean number of sit-ups per day is 100, equate these two means and solve the equation:

Answer: 175 sit-ups
Answer:
if I'm thinkng straight integers do always have to be whole numbers but they also can be negative
Answer:
The left over area is 1,815 m.
Step-by-step explanation:
60x34= 2,040
25x9=225
2040-225= 1,815.
Answer: normal force of the ground pushing the boy up