Answer:
13x -42 124/x+3
Step-by-step explanation:
The area of a trapezpid is 1/2h×(b1+b2)
We can use the vertex form of a quadratic,

, to find that

. Plugging

ordered pairs into g(x), we see that a = 1. For example, for

,

. Solving for a gives 1.
Full turn = 360°
Number of 90° = 360 ÷ 90 = 4
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Answer: It takes 4 90° to make a full turn.
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Refer to the attached file
For your understanding,I am sending this too so that u can understand the concept