On a two question true or false quiz what is the probability of guessing both answer answer correctly

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

How do you solving the solution of each system using elimination?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.