Which expression is equivalent to the given expression? 13(x – 21) a. 13x – 21 b. 13x – 34 c. 13x – 13 • 21 d. 13 – 21x

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7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²