Answer:
Step-by-step explanation:
2(4) - 4y = 20
8 - 4y = 20
-4y = 12
y = -3
x = 4
(4, -3)
4500 dollars! $9000 x 2 = 4500
Answer:
x = π/4 and 5π/4
Step-by-step explanation:
Given the expression;
2cos²x - 1 = 0
2cos²x = 0+1
2cos²x = 1
cos²x = 1/2
cos x = ±√1/2
cos x = ±0.7071
x = arccos(±0.7071)
x = ±45 degrees
Convert to radians
Sence 180° = π rad
45° = x
x = 45π/180
x = π/4
If x = -45°
Since cos is negative in the 3rd quadrant
x = 180 + 45
x = 225°
x = 225π/180
x = 45π/36
x = 5π/4
25X100= 2,500 at the door
2,500-20,500 = 18,000 lift
18,000/15 =1,200 people on line
First, I would subtract 150 from 870. You get 720. Then I would divide that equally among the four artists. 720/4=180. So each person's share is $180.
