b equals 0 I looked it up have a good day
Answer:
intercept 
line 
Step-by-step explanation:
Let
is the required line.
<u>Slope of perpendicular lines :</u> If
and
be slope of two perpendicular lines. Them 
is perpendicular to 
the slope of
is 

Hence eqn is 
This equation passes through 

so the line is 
<u>y-intercept :</u>
Substitute 

Answer:
-31
Step-by-step explanation:
hope this helped! <3
Answer:
584
Step-by-step explanation:
25 × 8 + 20 × 8 + 8 × 20 ÷ 2 + 8 × 8 + 20 × 8 ÷ 2 =