Chapter 7-Section 2. System of Linear Equations in Three Variables. Systems in Three Variables. Elimination by Addition. Elimination by Addition (Cont). Elimination by Addition (Cont). Applications.
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A garment industry manufactures three shirt styles. Each style shirt requires the services of three departments as listed in the table. The cutting , sewing, and packing departments have available a maximum of 1,160, 1,560, and 480 labor-hours per week, respectively. How many of each type shirt must be produced each week for the plant to operate at full capacity?
In 2001 there were 110 million cell phone subscribers in the US. The number grew to 128 mil in 2002 and 141mil in 2003. Construct a model for three data by finding a quadratic function whose graph passes through the point (1,110), (2,128) and (3,141). Use this model to estimate the number of subscribers in 2004 and 2005