PLEASE ANSWER!!!!!!!!!!!!!!!!!!
The person buys a total of 20 frames. 'f' of the frames are size 4 by 6, and cost 5.8that means 20 - f frames are size 5 by 7, and cost 9.6And the total is 80.8So... we get:5.8f + (20-f)9.6 = 80.8Answer is B