The longest side of an obtuse triangle measures 20 cm. the two shorter sides measure x cm and 3x cm.

rounded to the nearest tenth, what is the greatest possible value of x?

6.3
6.4
7.0
7.1

Which of the following is the result of expanding

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?