Solve the Problem Using Matrices $91 \mathrm {~cm}$ the Sum of the Two Longer Pieces Is

question 373

Multiple Choice

Solve the problem using matrices.
-Jerry has three pieces of string. The total length is $91 \mathrm {~cm}$ . The sum of the two longer pieces is $76 \mathrm {~cm}$ . The middle piece is twice as long as the shortest piece. What are the lengths of the three pieces?

• A) No solution
• B) \(15 \mathrm {~cm} ; 30 \mathrm {~cm} ; 46 \mathrm {~cm}\)
• C) \(7.5 \mathrm {~cm} ; 15 \mathrm {~cm} ; 68.5 \mathrm {~cm}\)
• D) \(15 \mathrm {~cm} ; 46 \mathrm {~cm} ; 56 \mathrm {~cm}\)

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