Answer:
D
Step-by-step explanation:
5x-2+2x+1
5x+2x+1-2
7x-1
Answer:
10
β
Step-by-step explanation:
We can find this two ways, first by seeing in the step after it, cosines are canceled out. Since you already have 10
β
on the next step, you can assume that (since only the cosines changed and the cosine next ot the blank was removed), the value is 10
β
.
You can also use double angle formulas from the previous step:
(sin(2β) = 2 sin(β) cos(β))and find that:
5 sin (2β) sin(β) = 5 * (2 sin(β) cos(β)) sin(β)) = (10 sin(β) sin(β)) cos(β) =
10
β
cos(β)
But since cos(β) is already present, we can see that the answer is 10
β
Answer:
9
Step-by-step explanation:
45 Cookies... 5hrs
? cookies... 1 hr
45 ÷ 5 = 9
9 cookies per hour
The speed of the airplane = 2951 / 6.5 = 454 mph