explain how to solve 6(a+3.9)=19.56 using a different method.

A = - 0.64

Divide each term in  

6 ( a + 3.9 )  =  19.56  by  6

6 ( a + 3.9 )/ 6  =  19.56/ 6

Cancel the common factor of  6

a  +  3.9  =  19.56 /6  Divide  19.56  by  6 ,  a + 3.9  =  3.26

answer: i believe c. is the answer sorry if i am wrong

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk