Answer:
c
Step-by-step explanation:
Answer: I think 27/2
Explanation:
Let number = x:
√(2x - 11) = 4
Now to get x, we undo the square root by squaring both sides:
[√(2x - 11)]² = 4²
(2x - 11) = 16
2x = 27
x = 27 / 2
Hope this helps!
Answer:
x=29 y=90
Step-by-step explanation:
Answer:
2 solutions
Step-by-step explanation:
Answer:
sin(a) =
Step-by-step explanation:
cos(2a) = cos²(a)-sin²(a) = [1-sin²(a)]-sin²(a)= 1 - 2sin²(a)
1 - 2sin²(a) = -20/29
- 2sin²(a) = -49/40
sin²(a) = 49/80
sin(a) =
sin(a) = =
sin(a) =