The diagonal reinforcements to the door of the cage where the lions sleep at night needs to be replaced. The lion keeper only knows the following information: One diagonal in the rectangle is 7x + 19 in and the other diagonal is 6x + 38 in. He asks for your help to find the sum of the lengths of both diagonals.   Round your FINAL answer to the nearest hundredth, if necessary.  Please show work

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Polynomials

Try substituting 1. You will get 6 and not 0. Try other real values also. What About -2? Let us check.