Answer: D
Step-by-step explanation:
By De Moivre's theorem, the argument will be 120 degrees, which is the same as the argument of
.
This isn't the case for the other 3 options.
20%=0.2
14*0.2 = 2.8 ( $2.80 is the tip she will be giving her)
$14+$2.80 = $16.80 ( what she will be giving in total)
$20-$16.80 = $3.20 (the change she will get back)
Answer:
option 3
Step-by-step explanation:
the ray is an angle bisector and divides the opposite side into segments that are proportional to the other two sides , that is
=
( cross- multiply )
4x = 5(12 - x)
4x = 60 - 5x ( add 5x to both sides )
9x = 60 ( divide both sides by 9 )
x = 
None of the choices are the value of x
3n+2n= 5n
22+38=60
180-60=60
60=5n
n=12