What is the perimeter of the rectangle?

a.
20 units

b.
21 units

c.
23 units

d.
24 units

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Prove that quadrilateral is a rhombus.

Witch represents the inverse of the function f(x)=1/4x-12