Bella cell costs $18 per moth plus 0.15 for every minute she uses the phone. last moth her bill was$20.25. for how many minutes did she use her phone last month?

Akitchen is 12 ft. by 14 ft. with 10 ft. high walls. how much would it cost to put vinyl flooring in this room? $8.80 per ft

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

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?