Review 12 15

Is the sequence arithmetic: 37, 31, 25, 19, ...

• Yes
• No

• 196
• 392
• 49
• 254

Find the first term of the given sequence:
a₁₄=68
d=3

• 14
• 20
• 26
• 29

A bathroom floor has tiles arranged in 9 circles.  The innermost circle contains 9 tiles.  Each successive circle contains 9 more tiles than the previous circle.  How many total tiles are on the bathroom floor?

• 81
• 396
• 405
• 729

Evaluate, k = 1

• -76
• 126720
• 76
• 34

What would two matrices need to be considered 'equal'?

• The same dimensions and different element values
• The same dimension and the same element values
• Two matrices can never be equal
• two matrices are 'equal' when they are added together to create a matrix of only "0's"

Find B-A

• -3     1
  7     -1
• 1     0
  1     -4
• 4       0
  -6     1
• not possible because rows do not match columns

find: B*A

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

Solve the system of equations: 

• ( 4, 0, -2)
• ( -4, -2, 0)
• None of these
• ( -4, 0, -2)

Solve the system of equations: 

• ( 4, 2, -1)
• ( 4, 3, -1)
• None of these
• ( -4, 3, 1)