Even though factoring is an acceptable method for solving, the square root method allows you to solve using the inverse relationship between taking the square root and squaring. The square root property states that if x2 = N and N is not negative, then x = or x = -.

When solving an equation, we are not sure if it is the positive or negative root or both that are solutions. Therefore, we must consider both roots when solving. We use the notation ± , read as "plus or minus."
Determine the solution set of x2 - 80 = 0.

{± }
{±4 }
{±2 }Determine the solution set of (x + 2)2 = 36.

{4, -6}
{4, -8}
{6, -8}

idk im srry

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west