Which of the following polygons has nine lines of symmetry?
a. regular octagon
b. regular heptagon
c. regular nonagon
d. regular hexagon

Simplify this expression.2(10) + 2(x – 4) a. 2x + 16 b. x + 12 c. 2x + 12 d. x + 16

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

Simplify the algebraic expression 8y-2(y+4)