Answer:
(4,6) is the solution.
Step-by-step explanation:
Given 
Let the solution be
.
The solution to this line means it should satisfy the equation. Therefore, substituting this we get,


Dividing by 4 throughout we get,

Therefore, the solution is: (4,6)
Answer:
fourth option
Step-by-step explanation:
Using the Law of Cosines in Δ STU to find s
s² = t² + u² - 2us cosS
where t = 9, u = 10 and S = 100° , thus
s² = 9² + 10² - 2(9)(10)cos100°