Indira has 18 coins valued at 4 point 2 0 dollars She has only quarters and dimes. Which augmented matrix can be used to determine the number of quarters and dimes in the collection?
Answer
A
the 2 by 3 matrix row 1, 1 0 point 2 5 4 point 2 0 row 2, 1 0 point 1 0 18
B
the 2 by 3 matrix row 1, 1 1 18 row 2, 0 point 2 5 0 point 1 0 4 point 2 0
C
the 2 by 3 matrix row 1, 1 0 point 2 5 18 row 2, 1 0 point 1 0 4 point 2 0
D
the 2 by 3 matrix row 1, 1 1 4 point 2 0 row 2, 0 point 2 5 0 point 1 0 18