Question 7 • Advanced Algebra: Concepts and Connections
Janelle is five years younger than Louisa. In three years, Janelle will be half Louisa’s age. If j represents Janelle’s age now and l represents Louisa’s age now, which matrices represent the situation?
Answer
A
the 2 by 2 matrix, row 1, column 1, 1 column 2, negative 1 row 2, column 1, 1 column 2, negative 1 half the 2 by 1 column matrix j l is equal to the 2 by 1 column matrix row 1 5 row 2 negative 3 halves
B
the 2 by 2 matrix, row 1, column 1, 1 column 2, negative 1 row 2, column 1, 1 column 2, negative 1 half the 2 by 1 column matrix j l is equal to the 2 by 1 column matrix row 1 5 row 2 negative 3
C
the 2 by 2 matrix, row 1, column 1, 1 column 2, negative 1 row 2, column 1, 1 column 2, negative 1 half the 2 by 1 column matrix j l is equal to the 2 by 1 column matrix row 1 negative 5 row 2 negative 3 halves
D
the 2 by 2 matrix, row 1, column 1, 1 column 2, negative 1 row 2, column 1, 1 column 2, negative 1 half the 2 by 1 column matrix j l is equal to the 2 by 1 column matrix row 1 negative 5 row 2 negative 3