Paul can type 60 words per minute and jennifer can type 80 words per minute. how does paul’s typing speed compare to jennifer’s

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?