A. The cost of buying x number of concert tickets for $76 each.
The answer is b
2cos x + 1 = 0
2 cos x = -1
cos x = -1/2
x = cos^1(-1/2)
(cos inverse (-1/2))
x = 120°
24 because she already completed four and if she completes twelve more that that will be 24 hope that helps
Answer:
40
Step-by-step explanation:
Dominic: 32/80
Eva: 48/80
Freya: 60
32+48+60= 140
Answer:

Step-by-step explanation:
We can directly substitute y of the first equation to the second equation.
-2x - 1 = 3x - 16
5x = 15
x = 3
Substituting back to any of the two equations, we get y = -2(3)-1 = -7. If you check with the second equation, y = 3(3)-16 = -7 as well.
Therefore
.