Answer:
161
Step-by-step explanation:
145+318=463. 624-463=161
The given lines are perpendicular
Step-by-step explanation:
if Two lines are perpendicular then their slopes are
m
Where m₁ is slope of first line and m₂ is the slope of second line.
Since the lines are in slope-point form the standard form is:

where m is the slope
The slope of first line y= -9/5x + 1/5 is: m₁ = -9/5
The slope of second line y= 5/9x + 2/9 is: m₂= 5/9
So, m
i.e 
So, The given lines are perpendicular
Keywords: Perpendicular lines, slope
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if a =2 and b =3 then that would mean (2)(3)=(3)(2) so 2*3=3*2 and 2*3=6 and 3*2=6 so yes (2)(3)=(3)(2) or ab=ba
hope this helps
Answer:
We know that since it's a square, the lenght size is the same on all sides. We can simply use pythagoras theorem:
a^2 + a^2 = 13.5^2
13.5^2 = 182,25
182,25 : 2 (because there are 2 'a') = 91,125
<u>The square root of 91,125 is 9,55 feet.</u>
If u think of it this way
8*4=32 it has to be smaller than that so my best guess would be
C) 20 square units