First you must convert the denominator to an equal number by finding a same multiple, in this case it is 12. So the factions convert to 3/12 and 8/12. Now add the two, resulting in 11/12. So the answer is 11/12
Answer:
243.911, or rounding to the nearest unit, 244.
Step-by-step explanation:
For this, you need to know a concept in Trigonometry called "Law of Sines". This states that the ratio of any side of a triangle to the sine of the angle opposite is equal for all cases in that triangle.
Knowing this:

Kx^2-x-1=0
Kx^2-x=1
Kx^2=1+x
K=1+x/x^2
We simply rearrange the equation to find t:
rt = d
t = d/r