4. photos the cost of having photos taken
includes a sitting fee and $12 for each
portrait. the cost of 3, 6, and 9 photos
respectively is $51, $87, and $123. what
is the sitting fee?

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x

Write the slope intercept equation for line ab.

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?