Which of the following is the equation for a line perpendicular to y=2x−5 and having a y-intercept of −3? select one: a. y=−3x+5 b. y=−12x−5 c. y=−12x−3 d. y=2x−3

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

How many square centimeters of wrapping paper will be used to wrap the shoe box?

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