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Which expression is equivalent to (-11x2 +1.4x-3) + (4x2-2.7x+8)

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Solve |2x - 5| = 4 if anyone could , that would be great

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.