Name: if x = -4 and y = 3 , what is the value of x -3y^2

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 .

Can someone me with these two circle theorem questions asap?

Use circumcenter theorem to solve for the given values