Which graph represents the following system of inequalities? y>(1)/(2)x-1 y<=-x+1 y>-2x-1

Which expression is equivalent to 2x^2+7x+4?

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?

[tex]5 \times1 \frac{12}{13} [/tex] me