Find the value in the attached trapezoid, with area 60 square centimeters.

The triangles are similar. what is the value of x? show your work.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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 .