Answer: 
Step by step:

(Used a table of common angles)
Answer:
percent is 1/100
you just multiply the percentage value by 1/100 to find its value
If for example you are taking 20% of 500, then 20*500/100= 100 is the answer
Answer:
BC= 3
Step-by-step explanation:
Suppose a line BD is 10 and it has a point C somewhere on the line. It is given that BC is 3times and CD is 7 times or algebraically if we take x as a variable then according to the given information
BC+ CD= BD
3x+ 7x= 10
10x= 10
x= 10/10
x= 1
3x would give 3 (1)= 3
Hence the Line BC = 3
and the line CD= 7
The answer to this question is A-3/6 b is 3/6