Step-by-step explanation:
![\cos 90 \cos 30 + \sec^2 45 \sin 30 - \cos 270 \sin 180](https://tex.z-dn.net/?f=%5Ccos%2090%20%5Ccos%2030%20%2B%20%5Csec%5E2%2045%20%5Csin%2030%20-%20%5Ccos%20270%20%5Csin%20180)
But we know that
![\cos 90 = \cos 270 = \sin 180 = 0](https://tex.z-dn.net/?f=%5Ccos%2090%20%3D%20%5Ccos%20270%20%3D%20%5Csin%20180%20%3D%200)
and
![\sin 30 = \dfrac{\sqrt{3}}{2} \:\:\text{and}\:\: \sec 45 = \sqrt{2}](https://tex.z-dn.net/?f=%5Csin%2030%20%3D%20%5Cdfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D%20%5C%3A%5C%3A%5Ctext%7Band%7D%5C%3A%5C%3A%20%5Csec%2045%20%3D%20%5Csqrt%7B2%7D)
so this leaves us with just
![\sec^2 45 \sin 30 = (\sqrt{2})^2 \left(\dfrac{\sqrt{3}}{2} \right)= \sqrt{3}](https://tex.z-dn.net/?f=%5Csec%5E2%2045%20%5Csin%2030%20%3D%20%28%5Csqrt%7B2%7D%29%5E2%20%20%5Cleft%28%5Cdfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D%20%5Cright%29%3D%20%5Csqrt%7B3%7D)
It's A, increased by a factor of 6.
Answer:
No
Step-by-step explanation:
Number of tickets can only be represented by integer values. A value of 3.5 for t would imply you can purchase three and a half tickets, which isn't possible.
56 miles per hour
15 minutes is 1/4 of an hour
1/4 = 0.25
so 56 x 4.25 = 238 miles