Alexei wants to hang a mirror in his boat, and put a frame around it. The mirror and frame must have an area of 19.25 square feet. The mirror is 3 feet wide and 5 feet long. Which quadratic equation can be used to determine the thickness of the frame, x? 2x2 + 8x - 19.25 = 0 3x2 + 5x - 19.25 = 0 4x2 + 16x - 4.25 = 0 4x2 + 16x + 15 = 0

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Alexei wants to hang a mirror in his boat, and put a frame around it. The mirror and frame must have an area of 19.25 square feet. The mirror is 3 feet wide and 5 feet long. Which quadratic equation can be used to determine the thickness of the frame, x? 2x2 + 8x - 19.25 = 0 3x2 + 5x - 19.25 = 0 4x2 + 16x - 4.25 = 0 4x2 + 16x + 15 = 0

Mathematics
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The first part is already in squared terms. "19.25 sq ft" Taking the measurements for the mirror 3ft and 5ft, you'd get: "15 sq ft." Subtract that answer from the previous number to get "4.25 sq ft." And you should get C (just by looking at the answers lol).
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Other answers:

c is the answer
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