10x + 5
Or 5(2x + 1)
Hope this helps!! Let me know if you have ANY questions.
We can use the formula for a parabola:

where

is the origin of the parabola and

is some constant scaling factor.
We are given that the center of the arch on the bridge is

. This is our origin. So our equation is:

Now we just need to find c. We can do this by plugging in one of the other points given:


So our final equation for the arch of the bridge is:
Answer:
2, 3, 4 all have one solution.
Step-by-step explanation:
The first one has no solution.
The second one has a solution of -65/68.
The third one has a solution of 5.
The fourth one has a solution of 13/2.
Hope this helps!!
Let me know if I'm wrong...
CosOsinO - 0.5 cosO = 0
cosO(sinO - 0.5) = 0
so cosO = 0 , sin O = 0.5
cosO = 0 gives O = pi/2 , 3pi/2
sinO = 0.5 gives O = pi/6, 5pi/6.