Which of the following expressions is INCORRECT given the value for the variable n? 50 - n = 40, n = 10
24 ÷ n = 6, n = 4
6 + n = 10, n = 1
3n = 9, n = 3

Mr. rose asked his students to draw a quadrilateral with 4 unequal sides. draw an example of this kind of quadrilateral.

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.