Answer:
-5
Step-by-step explanation:
(-3)(5) =-15 +10 =-5
This question is asking "Where does cosine equal

?"
Based on our unit circle values and the domain of the cos^{-1} function, we see that at 30 degrees, or

, cosine is equal to

.
Answer:
7x + 2y = 9
Step-by-step explanation:
standard form is always written as:
Ax + By = C
Answer:
The domain is t ≥ 0
The range is D ≥ 0
Step-by-step explanation:

D(t) = 100t + d₀
t is the time measured in hours.
d₀ is the initial position of the train.
We can assume the distance they go is not negative so...
The domain is t ≥ 0
The range is D ≥ 0
The answer would be A because each side is being multiplied by 3