James bought 5apples and 10oranges for $4. Donald bought 3apples and 9 oranges for $3. The shopkeeper said there would be no discounts. What is the cost of an apple and an orange?<br />
Ana takes a test that has 25 questions for a total score of 150points. Among the 25 questions, each multiple choice question carries 3 points and the descriptive questions carry 8 points. How many multiple choice questions and descriptive questions are there in the test? <br />
The sum of the digits of a two digit number is 7. When the digits are reversed, then the number is decreased by 9. What is the number?<br />
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