Note that

and

.
From the unit circle, we can check that

and

have the same value, but opposite signs, that is:

.
Thus,

.
Note that

is the x-coordinate of the lowest point on the unit circle, that is (0, -1). Thus

Answer: 0
Answer:
m<A = 107
m<B = 73
m<C = 107
m<D = 73
Step-by-step explanation:
2(4x + 1) + 2(5x + 17) = 360
8x + 2 + 10x + 34 = 360
18x + 36 = 360
18x = 324
x = 18
4x + 1
4(18) + 1
73
5x + 17
5(18) + 17
107
Answer: 12 minutes
Step-by-step explanation:
7 km ........ 4 minutes
21 km ...... ?
21/7 x 4= 12 minutes
Since each type of drink (lemonade, water, and juice) is equally likely to be chosen, the probability of choosing a type of drink is 1 in 3 picks. Thus, in order to get all three types of drinks, one must pick 3 times.