Well you can start by drawing a triangle with the information
the size of angle B can be found using the Law of Sine

the size of angle C can be found using angle sum of a triangle.
The length of side c can be found using the Law of Cosines

hope it helps
Answer:
the correct answer is 21.07070206.
Answer:
Step-by-step explanation:
First add 5x to 12x which becomes 17x and subtract 8 from 12 which becomes 4. So the answer is 17x+4!
So to find the mean you add them all together and divide by the number of numbers there is so 11+15+19+17+23+20+17+18+21=174 and there are 10 numbers so it would be 174/10 which is 17.4 so you answer is 17.4
The length is 10
The width is 4
4 + 6 = 10
4 x 10 = 40