Easy algebra question

Find the value of x for which line a is parallel to line b

Ben works in his dads bakery packing bagels each package can have no more then 16 bagels 3/4 of the bagels in each package are plain what other fractions could represent the part of the bagels in each package that will be plain

Three runners competed in a race data were collected at each mile mark for each runner if the runner ran at a constant pace the data would be linear