Solving pairs of linear equations in two variables

 $y=2x-3;\ 2x+4y\ =\ 8$  

Determine if graphs of the equations are parallel, perpendicular, coincide, or intersecting but not perpendicular lines.

• parallel

• perpendicular

• coincide

• intersecting but not perpendicular

• perpendicular

• parallel

• neither

What is the solution to

y = 6

y = 1

• (0, 0)

• (6, 1)

• No solution

• Infinity many solutions

y = 1.2x - 0.2
y = 3.8x - 0.2

• One

  Solution

• No

  Solution

• Infinitely Many

  Solutions

• (2, 1) only

• (3, 6) only 

• Infinitely many solutions

• No solution

If the coefficients are different, the equation will have ______ solution.

• no

• one

• infinite

• Infinitely Many Solutions

• (0, 8)

• No Solution

• (-8, 0)

• perpendicular

• parallel

• neither

Which of the following statements is/are true?

i. A system of linear equations cannot have more than one solution.

ii. In a system of two linear equations, if the coefficients are equal, the system has no solution.

iii. If the graphs of the system of two linear equations coincide, it means the system has infinitely many solutions.

• iii only

• i and ii

• all of them

• i and iii

Are 2x + 2y = 20 and y= -x+20 the same line?

• Yes

• No