Answer:
The most straightforward way to obtain the expression for cos(2x) is by using the "cosine of the sum" formula: cos(x + y) = cosx*cosy - sinx*siny. cos(2x) = cos² (x) - (1 - cos²(x)) = 2cos²(x) - 1. = 2cos²(x) - 1.
Step-by-step explanation:
The zero is closed to the origin
Answer: D!
Step-by-step explanation:
Answer:
5 nights
Step-by-step explanation:
Solve the inequality:
90x + 90(0.1)x + 12x + 30
600
Add like terms:
102x + 30 + 90(0.1)x
600
Isolate the variables:
102x + 90(0.1)x
570
102x + 9x
570
111x
570
x
5.13
So, the Lincolns can stay for 5 nights without exceeding $600
Answer:
Step-by-step explanation:
He took a rest from driving at 4pm. That is proved through there being no change in the number of miles from 4pm to 5pm.
He covered 50 miles from 1pm-2pm and 3pm-4pm. 175-125=50 and 250-200=50.
I am not sure about the answer to part c but it is not iii, so it is either i or ii.
I also do not believe it is i because you can calculate his speed from the given information on the graph so if I were you I would circle ii.