What are the roots of the quadratic equation below? 2x2 + 8x+ 7 = 0
O A. x= -2+2
O B.
X =
-8+ V120
4
-2 + 120
O C. X=
1
O D. x= -422

the 3rd option is right

step-by-step explanation:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

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