Find the missing quantity in the double number line.

7

Step-by-step explanation:

we first divide 12 by 3 and we get

that means:

for 4 pints we have 1 pitchers

so 28=4*7

so that means for 28 pints we have 7 pitchers

step-by-step explanation:

once you graph it hit 2nd (the blue button) and graph

that takes you to a table of coordinates

on the left is x coordinates and on the right is y coordinates and an empty box

(you may have to scroll up/down in order to get ( x, 0)

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.