The matrices shows the number of dance students enrolled in each type of class for two different years.

enrollment 2008

ballet ballroom country

begineer 52 18 21

intermediate 64 10 6

advanced 33 9 15

enrollment 2009

ballet ballroom country

begineer 41 27 9

intermediate 67 15 17

advanced 48 11 6

which matrix shows the change in enrollment from 2008 to 2009?

a) 93 45 30

131 25 33

81 20 21

b) 11 9 12

3 5 11

15 2 9

c) -11 9 -12

3 5 11

15 2 -9

d) 11 -9 12

-3 -5 -11

-15 -2 9

the answer turned out to be c

The correct answer is C.

Step-by-step explanation:

In order to find the answer, we need to subtract the corresponding areas. In order to find the change, we subtract the first matrix from the second. If we look at the numbers in the top right we see.

9 - 21 = -12

Since C is the only one with -12 in the top right corner, it must be the correct matrix.

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: