“Jorge solved the following system of equations by substitution. His partner Jenna checked his work and said she found an error. What step did Jenna find the error?

Answer is in the photo. I can only upload it to a file hosting service. link below!

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Balloon B is 3910 feet above balloon A.

Step-by-step explanation:

The figure for the given scenario is shown below.

From the figure,

QR is the distance of balloon A or B from Charlie, SR is the distance of balloon A from ground, is the angle of elevation of balloon A, is the angle of elevation of balloon B. S is the position of balloon A and P is the position of balloon B.

So, as per the question,

SR = 1200 ft, °, °.

From triangle ΔSQR,

Now, consider triangle ΔPQR.

Now, difference in the height of balloon A and B is given by the segment PS.

So,

Therefore, the balloon B is 3910 feet above balloon A.