Find the area of a rectangle with a length of 5x+2 and a width of x+4.
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The estimated number of people to attend the last bengals game of the season was 2000. the actual number of fans attending was 1200. by what percent did the estimate differ from the actual?

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?