Answer:
D, E
Step-by-step explanation:
All sides are not the same length so not A
Two sides are not the same length so not B
Not all angles are less than 90 so not C
All sides are different length so D
There is a right angle so E
Not all sides are greater than 90 so not F
Answer:
1
Step-by-step explanation:
this is because the number is not getting multiplied by anything.
Answer:
26.3 feet
Step-by-step explanation:
We have to first find the length of the side of each tile.
The area of each tile is 19.2
.
The area of a square is:
A = 
where L = length of side
Therefore:

6 tiles will be lined end to end to construct the walkway, hence, the length of the walkway is:
6 * 4.38 ≅ 26.3 feet
The mean book rating will decrease
Add all the numbers together:
5 + 5 + 6 + 7 + 7 + 7 + 7 + 8 + 8 + 8 + 9 + 9 + 10 + 10 + 10 + 10 + 10= 136
divide the total with the total amount of numbers
136/17 = 8
Now add all the numbers again WITH the one
5 + 5 + 6 + 7 + 7 + 7 + 7 + 8 + 8 + 8 + 9 + 9 + 10 + 10 + 10 + 10 + 10 + 1= 137
Divide the total amount with the amount of numbers there are
137/18 = 7.61
7.61 < 8
The mean book rating will decrease by 0.39
hope this helps