Brianna has twice as many sneakers as Keyla. Diamond though, as 4 times as many sneakers as Brianna. If together they have 21 sneakers, how many does each have? This is algebra 2 btw

Landon drove 103.5 miles on tuesday 320.75 miles on wednesday and 186.30 miles on thursday for work his company pays 0.07 $ for each mile he drives he expects to be paid more than $40,000 is he correct explain