Question

Select all the systems of equations that have exactly one solution.

Option 1. y = 4x - 1 and y = -4x + 7 Option 2. y = 3x + 1 and y = 2x + 1

Option 3. y = x + 2 and y = x + 7 Option 4. 2x + 2y = 20 and 3x + 3y = 30

Option 5. x + y = 40 and x + y = 90

Answer 1

Option one and option 2

Explanation:

Only ones that have 1 solution, option 3 and 5 have no solution, option 4 has infinetly many.