I’m assuming you want to work out the area
area = length x width
area = 10 x 8
area = 80 inches^2
Bianca is 4'12, cause brian is 4'6, brianna is 3 inches taller so thats 4'9, Bianca is 3 inches taller than Brianna so she is 4'12
Just add three each time, 6+3=9 9+3=12
The given expression is :
2xx+3-5(x-2)
We know that, 

Aleena expands 2xx+3-5(x-2) as 2x²+3-5x-10. She is mistaken because the sign before 10 should be +10 instead of -10. Hence, the correct expanded form is 2x²+3-5x+10. Hence, this is the required solution.
Answer:
If the slopes of the lines are both zero, the lines are horizontal and are parallel by definition. Since the slopes of vertical lines are undefined and not considered equal, vertical lines will not be considered.
I hope this helps you :)