<h2>
<u>Answer:</u></h2>
Susan = x
Gina = 3x
Sum of their ages = 12
Susan's age = ?
We can see that,

Susan is <u>3</u><u> </u><u>years </u>old.
Answer:

Step-by-step explanation:
Step one:
given data
The charge is $45 to install the cable box and $60 for each month of service
Required
The linear expression for the situation.
Step two:
let the number of months be x and let the total charges be y
Hence the expression for the total charges is

Answer:
y=2/3x+4
Step-by-step explanation:
2/3 is the slope and 4 is the y int