Answer: 3
Step-by-step explanation:
The sine of an angle is equal to the cosine of its complement, so

The answer is 84 because 21 times 4 equals 84
144
If you add 9+6+9 is will give you 24 than you would times that by 6. So 9+6+9= 24 next 24×6=144.
Answer:allison
Step-by-step explanation:
Width = X
Length = X + 15
Perimeter of a Rectangle = 2W + 2L
2(X) + 2(X + 15)
2X + 2X + 30
4X + 30
Answer = 4X + 30
Hope this helps! :)