Based on the given information, which conjecture is invalid?

given: two non-coinciding lines intersect at point b.
the two lines are perpendicular.

the two lines are parallel.

the two lines form vertical angles.

the two lines intersect at no other points.

The sum of two numbers is 86, and their difference is 20. find the two numbers

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.