Answer:
The measure of the third side is 
Step-by-step explanation:
we know that
Applying the law of cosines

where
C is the angle between side a and side b
we have

substitute





Answer: Division
Parentheses first according to the order of operations, and the next thing you do is divide inside the parentheses.
Answer:
no
Step-by-step explanation:
7x+5y=15
(x,y)
(4,3)
put in 4 for x and 3 for y
7(4)+5(3)=15
43=15
This equation is impossible
Hope that helps :0
Answer:
55.44 i believe
Step-by-step explanation: