A food scientist uses a mixture of the gases helium and argon to preserve packaged food. The amount of each gas the scientist uses for the mixture is modeled by the equation 5.6H + 0.56A = 22.4, where H and A are the masses, in grams, of helium and argon, respectively. If the scientist uses 10 grams of argon, how many grams of helium are used

If angle 2=3x +1 and angle 3=2x +4what is angle 2

Formulate alisha has a number in mind. if she adds three to her number the result is less than five. use this information to write and solve an inequality about alisha's number. then graph the solution set.

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