A store owner determined 80% of customers bought a drink and 30% of customers bought a snack. If the store sold 120 snacks that day how many more drinks were sold

200 more drinks

Step-by-step explanation:

Let x = total number of customers

80% of x bought a drink

30% of x bought a snack

30% of x = 120

0.30 * x = 120

0.30x = 120

x = 120/0.30

x = 400

80% of x bought drink

80% * 400

= 0.80 * 400

= 320

320 customers bought a drink

How many more drinks were sold

= 320 - 120

= 200

200 more drinks were sold than snacks

dunno

step-by-step explanation:

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.