Answer:
x=11
Step-by-step explanation:
by simplifying we get x=11
its (a) because (a) is C(x)=3x4+30x and 9+21 is 30 so its 3x2+30
I believe the correct answer would be B. Rate 5 if this helped!<span />
Explanation:
One formula for the area of a triangle is ...
Area = (1/2)ab·sin(C)
This presumes you know the measures of two sides and the angle between them. The Law of Sines is typically used where you know all the angles and only one side measure.
You would use the law of sines to find an additional side measure, then make use of the above formula for area.