8x + y +z= 124,008 C) x + y - z = 0 x+ y +z = 124,000 0.09x + 0.08y + 0.1z = 11,400 9x + 8y + z = 11,400 D) x + y + z = 0 x+ y - 9z = 124,000 0.1x + 0.08y - 0.09z = 11,400 10) There were 35,000 people at a ball game in Atlanta. The day's receipts were $290,000. How many 10) people paid $14 for reserved seats and how many paid $6 for general admission? Let x represent the number of reserved seats and y represent the number of general admission seats. A) 14x + 6y = 105 x + y = 35,000 C) 25,000x + 14y = 35,000 x + y = 290,000 B) 20,000x + 14y = 6 x + y = 15,000 D) 15,000x + 14y = 20,000 x + y = 6 Solve using Gauss-Jordan elimination. 11) 2x - 5y = -9 11)

Many electronic (e-)cigarettes work by vaporizing a liquid mixture of flavors and (usually) nicotine that is contained in a cartridge. When the smoker inhales on the e-cigarette , the liquid passes through a heating element and turns to a mist. Of importance to a manufacturer and consumer is the number of "puffs' that a cigarette can deliver before the cartridge needs to be replaced. À puff is defined as a two-second inhale. One manufacturer notes that the number of puffs that its cartridge can deliver, Y, is a normally distributed random variable with a mean of 260 puffs and a standard devlation of 15 puffs. The manufacturer will replace a customer's cartridge free of charge if the number of puffs the customer gets out of the cartridge is below some guaranteed number. Suppose the manufacturer wants to replace no more than 2% of its cartridges as part of the guarantee. How many puffs should the manufacturer guarantee that a cartridge can produce? Round DOWN to the nearest whole puff.…

1. 3x +7 13 (x = -2; x 2; x = 5) 子(-543-

15) y".-y-4x³+6x²