Arock is thrown upwards from the edge of a 52 foot cliff and eventually falls to the ground. the graph below shows the height, y, of the rock from the ground after x seconds. for witch interval is the rock height always increasing

Find the solution of this system of equation -7x+y=-20 9x-3y=36

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect