Answer:
Step-by-step explanation:
cos^-1(6/13)=62.5136°
sin(2*62.5136°)=0.8189
cos(2*62.5136°)=-0.5740
Answer:
12
Step-by-step explanation:
13.5 + 0.5n =19.5
0.5n=19.5 - 13.5
0.5n=6
n=6/0.5
n=12
Answer:2.78×10^2
Step-by-step explanation:
22+52+424-220
=278
In standard form
=2.78×10^2
Answer:
X= -1/2
Step-by-step explanation:
8x-4(-5x-2)=12x
8x+20x+8=12x
28x+8=12x
8=-16x
-1/2=x
