Rate of change for my sister

Use the distributive law to multiply. 3(4x + 5y + 6)

Sum is 17 and their difference is 3

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 .