Answer:
2.51
Step-by-step explanation:
Remove the decimal from 8.25 and 20.75.
20.75 inside the house 8.25 out side
then divide
Y=3x-1 (2, 5),
Answer is B (2, 5)
Answer:
C) 
Step-by-step explanation:
By the cos double angle formula, we know
Substituting
into the formula, we get
.
The answer is C.
Use photo math it works great