Two apples plus four bananas cost $2.00. An apple costs twice as much as a banana. Using the equations 2a + 4b = 2.00 and a = 26, where a is the cost of one apple and b is the cost of one banana, what are a and b?

Answer:
(B) a = $0.50, b = $0.25
Step-by-step explanation:
Answer choice B is the only one in which an apple costs twice as much as a banana.
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It helps to see if the answer choices match the requirements of the problem statement.