I am not quite sure which side is which person, but the correct answer is to distribute the 5 to both -2 and -1/4. This would result in -10 and -5/4. This would be equivalent to -11 1/4.
![\huge\color{lime}\boxed{\colorbox{black}{Answer : - }}](https://tex.z-dn.net/?f=%5Chuge%5Ccolor%7Blime%7D%5Cboxed%7B%5Ccolorbox%7Bblack%7D%7BAnswer%20%3A%20-%20%7D%7D)
sec² θ (1 + sin θ) (1 - sinθ ) = k
sec² θ(1-sin²θ ) = k
sec² θ cos² θ = k
sec² θ. 1 /sec²θ = k
1 = k
.. k = 1.
(a^2+a-3)-(3a^2-5)= -2a^2+a+2
C. is the answer
Hope it helps.
Answer:
He will need to drive 70 mph for the next hour for his average to be 50pmh.
Hope this helped :)