7 - 3 1/4 = (turn mixed number to improper fraction
7 - 13/4 = (common denominator is 4)
28/4 - 13/4 =
15/4 or 3 3/4 gallons remain in the tank
The answer is $213 because you subtract the price sold by the price he bought them for and then you add them together (see work)
We need to subtract: the scientist needed 57,500 dollars, but already had 32,506, so we need to find what's left: 57,500 - 32,506 = 24,992 dollars
Your answer is A. Hope that helps! :)
I think you might’ve forgotten to insert a picture? Feel free to reply to this with the picture of the question and I’ll do my best to help you out :)