Answer:
B
Step-by-step explanation:
Step-by-step explanation:
We know that
cos 2x = 2cos²x - 1
So we have
Substituting
y -2 1 10 2
Answer:
x represents the amount of burgers you order at a restaurant and they each cost $5 y represents your total in cost of $ so if you get 3 burgers for 5 dollars each y= $15
Step-by-step explanation: