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choose the best answer
sydney likes to keep her house a consistent temperature and is
upset to find a change when moving from upstairs to downstairs. if
the temperature downstairs is - 9 degrees and the temperature
upstairs is -6 degrees, then what integer represents the
temperature change that sydney experienced?
-3
- 15
15

include a picture of the drawing in order for me to

step-by-step explanation:

b). 4320 have a nice day

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

391.6 is the correct answer