Jerry's brought 4 DVD's for 25.20 . What was the unit rate?

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 .

How do you write y-10=2 (x-8) in standard form

Ineed to find the answer to number 2