To find the mean or the avg you add up all the numbers you have and then divide by how many numbers you added together in this case 5
so the mean is 22, hope this helped you!
The height is 5 becuase if the area is 35 that means the length is 7 so you would divide and get 5
1 + (-5) becomes 1 - 5 because you are adding a negative number.
1 - 5 is -4
3.5 miles per hour :) hopefully this helps!
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