<span>I : 2n + 1
II : 2n + 3
III : 2n +5
(2n + 1) + (2n + 3) +(2n+5)=63
6n+9=63
n=9
I : 2n+1=9*2+1=19
II : 2n+3=9*2+3=21
III : 2n+5=9*2+5=23
19+21+23=63
</span>
Answer:
Step-by-step explanation:
A is correct answer
If the span is 16-ft, then the half-span is 8-ft.
Pitch = (rise) / (half-span) = 6/8 = 3/4 or 0.75 or 75% .
That's a VERY steep roof !
<span>42x^3+21x^2-35x divided by 7x comes out to
42x^3 21x^2 35x
-------- + --------- - --------
7x 7x 7x
Reducing these 3 fractions, we get 6x^2 + 3x - 5 (answer)</span>