Solve the following equation and check. 4/7x + 5/14x = 39

The solution is ? simplify your answer.

Step-by-step explanation:

4/7x + 5/14x = 39

1/x(4/7+5/14)=39

1/x=39×14/13

x=13/546=1/42

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

why do wages differ across industries

step-by-step explanation :

micro economists are concerned with economics on an industry or individual firm basis.

macro economists are concerned with national and international level