How do I get total bill

Solve: 3x+y=6 4x-2y=18 show all work !

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .