The rectangle has an area of x^2 - 9 square meters and a width of x - 3 meters. What expression represents the length of the rectangle?

Length = x + 3 meters

Step-by-step explanation:

Expression for the area of the rectangle =

Expression for width of rectangle = () m

Area of a rectangle =

⇒ Expression for length of rectangle =

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.