Taking this step by step:
We can start by squaring 2x+5. Expanding (2x+5)(2x+5), we get:
Multiplying by 4pi, we then get:
This is equal to option C.
Answer:
-7/18
Step-by-step explanation:
cos(2x) = 1 - 2sin²x
cos(2x) = 1 - 2(5/6)²
= 1 - 2(25/36)
= 1 - 25/18
= -7/18
It would be 19/4.
I hope this helped you
Answer:
x=5
Step-by-step explanation:
We know that the angels in a triangle are equal to 180.
(6x+20)+(7x-10)+105=180
We open the prentices and simplify.
13x+115=180
Now we can subtract 115 on both sides.
13x=65
At last, we can divide by 13 on both sides to get the result of x.
x=5
