Answer:
3.5 hours*3.25 mph=11.375 miles
11.375 miles/3.45 mi/hr=3.297 hours or 3.30 hours, about 12 minutes faster.
Step-by-step explanation:
2cos^2x+cosx-1 = 0
2cos^2x + 2cosx - cosx - 1 = 0
(2cos^2x + 2cosx) - (cosx + 1) = 0
2cosx(cosx + 1) - 1(cosx + 1) = 0
(cosx + 1)(2cosx - 1) = 0
cosx+1 = 0 or 2cosx-1 = 0
cosx+1 = 0 gives cosx = -1, x = PI
2cosx-1 = 0 gives cosx = 1/2, x = PI/3 or x = 5PI/3
answer: x = PI/3 or x = PI or x = 5PI/3
Answer:
=
2
5
Step-by-step explanation:
−
2
0
=
5
n-20=5
n−20=5
−
2
0
+
2
0
=
5
+
2
0
Answer: 5/3
i hope that’s correct :)