The GCF of 18 and 39 is 3
The radical equation is

.
i) We first isolate the square root, adding 5 to both sides of the equation:

ii) Here let's substitute x+6 with t. Doing so we have:

Squaring both sides, we get:

iii) Collecting the variables on the same side, and factorizing t we have:

, which yields
t=0 or t=1.
Now we solve for x in x+6=t:
x+6=0 ⇒x=-6 and x+6=1⇒x=-5.
iv) Now we check these values in the original equation

:
a)

⇒ 0=0 ; Correct.
b)

⇒ 1=1 ; Correct.
Answer: <span>x = −6 and x = −5 </span>
The conversion from hectometers to decimeters may be done by proper dimensional analysis and the conversion factors. Each hectometer is composed of 100 meters and each meter is composed of 10 decimeter. From this,
(0.55 Hm) x (100 m / 1 Hm) x (10 dm / 1 m) = 550 decimeter
Thus, 0.55 hectometer is equal to 550 decimeters.
(6-3)/(3-1) = 3/2
3/2 is the slope