What is the y-coordinate of the solution of the system? 4x−y=−21

y = x + 6

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Name the most appropriate metric unit for each measurement like the mass of cow

Find the value of the variable and the length of each secant segment.

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.