Can someone explain to me how to do this and me? asap

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

What is a correct first step in solving the inequality-4(3-5x)> -6x+9

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