Answer:
cos x (2 sin x − 1)
Step-by-step explanation:
sin(2x) − cos x
Use double angle formula.
2 sin x cos x − cos x
Factor.
cos x (2 sin x − 1)
It will take 49 minutes for 9 people to paint 7 walls
Answer:
26+32=10v
add numbers
58=10v
10v=58
divide both sides by 10
v=5.8
There will be 6 vans needed
58/6=9.6
There will be 10 students in four vans, and 9 students in two vans.
Find a common denominator for 2,4,8. Which is 8. Change the fractions to new ones.
1) 19 4/8= 156/8 Then add the second. 2) 7 5/8= 61/8 one and the third
3) 5 6/8= 46/8 one. Which is
15/8. Then, subtract your answer and the first one. You get 141. Simplify. 17 5/8
