Systems of Equations - Substitution

Which system of equations has no solution?

•  $2x+5y=14;\ 6x+7y=10$  

•  $x-2y=7;\ -x+2y=7$  

•  $5x-5y=-3;\ y=x+\frac{3}{5}$  

• None of these answers

Which system of equations has one solution?

•  $2x+5y=14;\ 6x+7y=10$  

•  $x-2y=7;\ -x+2y=7$  

•  $5x-5y=-3;\ y=x+\frac{3}{5}$  

• None of these answers

Which system of equations has infinitely many solutions?

•  $2x+5y=14;\ 6x+7y=10$  

•  $x-2y=7;\ -x+2y=7$  

•  $5x-5y=-3;\ y=x+\frac{3}{5}$  

• None of these answers

Which system of equations has a solution of (0, 3)?

•  $4y+5x=15;\ x=8y+3$  

•  $6x+3y=9;\ 2x+9y=27$  

•  $x=17-4y;\ y=x-2$  

• None of these answers

Which system of equations DOES NOT have -1 as one of its ordered pair coordinates?

•  $x=y+3;\ 2x-y=5$  

•  $y=2x-1;\ 2x+y=3$  

•  $20x-30y=-50;\ x+2y=1$  

•  $2x+y=9;\ 4x-y=-15$