Use set-builder notation to describe the following sets: { 1 , 2 , 3 , 4 , 5 , 6 , 7 } { 1 , 10 , 100 , 1000 , 10000 } {- 1 , 1 / 2 , - 1 / 3 , 1 / 4 , - 1 / 5 , 1/6,. . . }

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.