7 pts D
Question 11
A local band played small shows recently where three kinds of tickets were sold:
regular adult tickets, senior tickets, and child tickets. For the first show, 33 adult
tickets, 19 senior tickets, and 25 child tickets were sold; the venue earned $648
from that show. The next show, 26 adult tickets, 30 senior tickets, and 17 child
tickets were sold; the venue earned $620 from that show. For the last show, 42
adult tickets, 27 senior tickets, and 14 child tickets were sold; the venue earned
$776 from that show.
Which of the following matrix equations below could be used to solve for the
cost for each type of ticket?
3
648
o [33 26 427
19 30 27
25 17 14
y
620
776
3
B
O 33 19 25
26 30 17
42 27 14
y
=
648
620
776
2
o
O
33 26 42
19 30 27 +
25 17 14
648
620
776
Y
o
33 19 25 [ 648
26 30 17 + 620
42 27 14 776
Y