Step-by-step explanation:
![(5x + 7) { }^{2} = 25 {x}^{2} + 2(5)(7) + (49)](https://tex.z-dn.net/?f=%285x%20%2B%207%29%20%7B%20%7D%5E%7B2%7D%20%20%3D%2025%20%7Bx%7D%5E%7B2%7D%20%20%2B%202%285%29%287%29%20%2B%20%2849%29)
Answer:
Option D. DE/DF
Step-by-step explanation:
The following data were obtained from the question:
Opposite = DE
Hypothenus = DF
Adjacent = EF
Sin θ =.?
From trigonometrical operations,
Sin θ = Opposite/Hypothenus.
With the above information, we can find Sin θ as follow:
Sin θ = Opposite/Hypothenus.
Sin θ = DE/DF.
Answer:
539.7
Step-by-step explanation:
Multiply 25.7 to 21 to get the answer.
yes, it is since none of the x's are repeated as with the y's