Answer:
<em>Option D is correct</em>
Step-by-step explanation:
Applying the cosine theorem for triangle ABC, you would have:
cos (angle BAC) = (BA^2 + CA^2 - BC^2)/(2*BA*CA)
= (10^2 + 18^2 - 20^2)/(2*10*18)
= 24/360
=> angle BAC = ~86 deg
Hope this helps!
2/16 because when you add all the marbles, you get 16 in total and there are 2 red marbles so there is a 2/16 chance of choosing one of the red marbles. If you want it simplified, it would be 1/8.
Answer:
1.9
Step-by-step explanation:
Use triginometry to find the side length. So cosθ=
. Rearrange the equation so it looks like 2cosθ=?. We are given θ (20 degrees) so 2cos(20degrees)=?.
Answer:
D. 110
Step-by-step explanation:
30+40=70
180-70=110
