Linear Systems by Matrix

Solve: (round to nearest hundredth)

2x + 5y = 55

9x - 2y = 3

• (2.56, 9.97)

• (14.68, 12.75)

• (2.55, 9.98)

• (12.75, 14.86)

Solve the following on your calculator:

(Round to nearest hundredth)

5x + 95y = 283

187x - 2y = 396

• (2.2, 2.9)

• (2.18, 2.85)

• (2.14, 2.86)

• (2.15, 2.87)

If a system of equations has no solution, what does the graph look like? 

• intersecting lines

• parallel lines

• skew lines

• intersecting lines

Solve for x and y
3x + 2y = 16
7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

If a system of linear equations has one solution, what does this mean about the two lines?

• Parallel lines

• the same line

• Intersecting lines

Solve the system of equations: 

• ( 5, 1, -4)

• (-5, 3, -1)

• None of these

• ( -1, 5, -4)

Dimensions?

• a

• b

• c

• d

What is the entry at r₃₁?

• 3

• 1

• 4

• 7

Determine whether the given matrix are identity matrix?

What is the solution?

• (1, -1)

• (-1, 1)

• (0, -2)

• (0, 1)