It is because they will always be divisible by 5.
The board is 12x larger in length than the nails. (Since the width of the board and nails are unknown, I am assuming you mean the length, not area difference)
Answer:
The answer is "0.4125"
Step-by-step explanation:

Answer:
x = -4
x = -6
Step-by-step explanation:
X^2+10x+24=0
(b/2)^2 = (10/2)^2 = 25
X^2+10x+25=-24+25
(x+5)^2 = 1
(x+5) = ± 1
x = +1 -5 = -4
x = -1 -5 = -6
Answer:
No solution unless you want to solve for an imaginary number which in that case 
Step-by-step explanation:



Here you can stop and say "no solution" since you cannot square root a negative number, but if you want you can still solve for an imaginary number:


