What is the sum of the rational expressions below? 3x
х
+
x-1
X + 2
O A.
4x2 - x
x²+x-2
4x
B.
x+1
C.
4x2 - 2
x² + x-2
D.
4x
2x+1

which expression represents the approximate length of bc?

step-by-step explanation:

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm