Answer: The correct answer is 18ft
Step-by-step explanation:
multiply the 2 numbers together than divide by 2
7 1/2 = 15/2
12 2/3 = 38/3
15/2 * 38/3 = 570/6 =95
95/2=47.5 square feet
When they say 'cost PER pound', the 'per' word means you've to divide cost by pound:

Doing that division on the calculator will give us $9.85, which is the cost per pound of of coffee!
Im pretty sure its 3x + 1