Francesca wants to glue this 5-inch by 7-inch photo on top of a mat that will increase the length of each side by another x inches. Find an expression representing the area of the
mat, and use this expression to find the area and cost of the mat for different values of x.

need more info

step-by-step explanation:

what do you mean by "representation"? graph? table? etc.

the answer is about 24 dollars

there are many, many solutions to this problem.

here are 5 examples:

7555531, 7+5+5+5+5+3+1 = 31

7155553, 7+1+5+5+5+5+3 = 31

7735531, 7+7+3+5+5+3+1 = 31

7375531, 7+3+7+5+5+3+1 = 31

7335931, 7+3+3+5+9+3+1 = 31