Find the circumference of the circle.

12 cm is in the middle with two straight lines one on the left and one on the right

Plz help!! I will give you the brainiest
The shape is a circle

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!