Solve x2 - 4x = 0 by graphing.
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Mary spent a total of $323.14 for a party.she spent a total of $200.22 on food,plus an additional $30.73 for each hour of the party.how long was the party?

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.