A qué categorías pertenece el -14

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?