A system of equations is given below
y= 1/2 x-3 and y=-1/2 x-3
Which of the following statements best describes the two lines?
They have the same slope but different y intercepte, so they have no solution
They have the same stope but different y intercepts, so they have one solution
They have different slopes but the same y intercept, so they have no solution
They have different slopes but the same y intercept, so they have one solution

NEED HELP

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).