What is the length of the midsegment of a trapezoid with bases of length 14 and 28

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 .

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

Y=21.95x+10 y=22.45x solve by substitution