Answer:
132.6 profit
Step-by-step explanation:
13 plus 30 percent 
$16.9 times 40
$676 
16.9 - 30%
$11.83 times 20
$236.6 plus 676
$912.6 - 13 × 60
$912.6 - $780
132.6 profit
 
        
             
        
        
        
Answer:
Let the base be p
Hypotenuse = 2p +6
Perpendicular = 2p + 4
By Pythagoras theoram 
(2p+6)^2 = (2p+4)^2 +p^2 
=> 4p^2 +36 + 24p = 4p^2 + 16 +16p +p^2 
=> 36+ 24p = p^2 + 16p + 16
=> p^2 - 8p - 20 = 0
=> p^2 - 10p +2p - 20 = 0
=> p(p-10) +2(p-10) = 0
=> (p-10)(p+2) = 0
p = 10 and - 2
Length can't be negative
So, 
p = 10
Base = 10
Perpendicular = 24
Hypotenuse = 26
 
        
             
        
        
        
Answer:
60.3
Step-by-step explanation:
hope this helps
 
        
             
        
        
        
Yes it is. Ax+By=C is standard form. :)
        
             
        
        
        
part A)
we know that for every 1000 ft the temperature drops by 1.3.
so after 1000ft up it went down by 1.3(1)
2000ft up it went down by 1.3(2) or 2.6
3000ft up it went down by 1.3(3) or 3.9
after 10000 up it went down by 1.3(10) or 13.
part B)
well, the current temperature on the ground where the plane is sitting is -2.8°F, after 10000ft it dropped by 13°, so the temperature will just be -2.8 - 13 = -15.8°F.