A100 gallon tank is initially half full of pure water. a spigot is opened above the tank and a salt solution containing 0.1 lb of salt per gallon of solution begins flowing into the tank at a rate of 4 gal/min. simultaneously, a drain is opened at the bottom of the tank allowing the well stirred contents of the tank to leave the tank at a rate of 2 gal/min. express the amount of salt in the tank as a function of time t.

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mark brainliest pl

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation: