At The local pet store zebrafish cost $2.10 each and neon Tetris cost $1.85 each if Marcia bought 13 fish for a total cost of $25.80 not including tax how many of each type of fish did she buy

g = (2, 2)

step-by-step explanation:

given the ratio is 1 : 1 then f is the midpoint of eg

let the coordinates of g = (x, y)

using the midpoint formula

(0 + x) = 1 ( multiply both sides by 2 )

0 + x = 2 ⇒ x = 2

similarly

(4 + y) = 3 ( multiply both sides by 2 )

4 + y = 6 ( subtract 4 from both sides )

y = 2

coordinates of g = (2, 2)

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72