In isosceles △abc, ab = bc and ch is an altitude. find the perimeter of △abc, if ch = 84 cm and m∠hbc = m∠bac +m∠bch

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

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 .