20. square-10+10=20x2=400m^2
circle- 3.14x10^2=3.14x100=314
400-314=86
86m^2
21.i don't get 21 sorry
Use distributive property to remove the parentheses:
Then, the product in the simplest form is:
Let 'c' represent the number of points Carlos scored.
2c - 7 = 31
c = 19 points
The first, second one because they synchronization are proved to equally cause them to be similar
113.25 because the middle ground of 1 - 150 students is 75 and then 1+150=151 2+149+151 but instead of doing that again and again just multiply the lowest number and the highest number by the middle ground
