Maria instala un vallado alrededor de su jardín. Cada 2 pies de vallado cuestan $12 Completar la siguiente tabla que muestra la longitud del vallado y el precio Longitud del vallado (pies) . 7 I Costo ($) D 48​

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition

How are algebraic expressions evaluated using substitution?

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