Solve.A 7-ft. board is cut into 2 pieces so that one piece is 3 feet longer than 3 times the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces.
A. shorter piece: 9 ft; longer piece: 24 ft
B. shorter piece: 3.5 ft; longer piece: 21 ft
C. shorter piece: 18 ft; longer piece: 21 ft
D. shorter piece: 1 ft; longer piece: 6 ft
Answer: D
Mathematics
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Solve the problem.The two charts show the weight gain of some people and the weight loss of other people. Use the information given to answer the question below. 
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Solve and check.
= 
A. x = 
B. x = 
C. x = 
D. x = 
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Find the indicated matrix.Let A = [-1 2] and B = [1 0]. Find 3A + 4B.
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Mathematics