Please don't take this down, I genuinely do not understand it!

Let X and Y be the following sets:

X = {5,10,15}
Y = {3,6,9,12,15}

Which of the following is the set X∪Y ?
CHOOSE ONE ANSWER
A. {3,6,9,12,15}
B. {5,10,15}
C. {3,5,6,9,10,12,15}
D. {}

c

Step-by-step explanation:

you add them in order for x and y hope that helped

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

just watch memes

step-by-step explanation:

it me < 3