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What is the standard form of -5x^2+2x^4-11+x^3+3x

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Find the distance between (7,-6) and (-3,-9)