Megan’s science teacher gave each student in her class a 20.0 gram sample of sedimentary rock. each student is required to verify the rock sample by taking four mass measurement. Which measurement is the most accurate of the four recorded?

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

Solve 3x-18=2y and 5x-6y=6 by elimination show work

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