Solve the systems by the addition method 2x + y = - 1x - 2y = - 4

answer: can you give the

step-by-step explanation:

the answer is -1 1/5, also a

hope i

-lavira : )

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