Kevin runs a farm stand that sells apples and raspberries. Each pound of apples sells for 3.50 and each pound of raspberries sells for 4. Kevin sold twice as many pounds of raspberries as pounds of apples and he made 115 altogether. Determine the number of pounds of apples sold and the number of pounds of raspberries sold.

$9.41

step-by-step explanation:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

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.