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?

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

What is the volume of a cardboard box that measures 1 inch by 5 inches by 7 inches? the volume of the cardboard is cubic inches. enter your answer as the number that correctly fills in the blank in the previous sentence. if necessary, round your answer to the nearest tenth, like this: 42.5