The answer is 5. Hope that helps :)
cos(3x) = cos(2x+x)
= cos(2x) cos (x) -sin(2x)sin(x)








First You Have To Plot It At -3 On the Graph And Go Up 2 And Over To The Right 3
Answer:
<h3>
y = 20</h3><h3 />
Step-by-step explanation:
line RPN = 180 = 4y - 10 + 90 + y
180 - 90 + 10= 5y
100 = 5y
y = 100/5
y = 20
18 = 2x + 4
2x = 14
x = 7
answer
first line: 1st box: 18 and 2nd box: 4
second line: $7 an hour