The correct answer here would be D. -1(3x+1)(x+5). You can find this answer by redistributing the problem.
-1(3x+1)(x+5)
-1(3x²+15x+1x+5)
-1(3x²+16x+5)
-3x²-16x-5
Using the math above, we can see that when we redistribute we get the original equation. That makes Choice D correct.
The unit rate would be 3 trucks per 1 hour you can find this by dividing 18 and 6 by 6
You should add them up both of the sides
SinB = 8/17
The sin of an angle is equal to opposite/hypotenuse
Use Pythagorean’s Theorem to solve for the opposite side

The opposite side is equal to 8
So sinB = 8/17
*look at attached photo for work
Hope this helps. Not positive if it’s correct, however.