Factor the trinomial below. 4x^2+12x+9
a. (2x+3)(2x+3)
b. (4x+1)(x+9)
c. (2x+1)(2x+9)
d. (4x+3)(x+3)

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.

Polygon abcd is a rectangle what is the area