Algebra( Week 21 Evaluation) 1. If 10x is deducted by 12y, and the difference is then multiplied by , which of the following is the result? 2. Which of the following is the correct representation of phrase "9 less than 11 times x"? 3. Ben is now 11 years old, and is 6 years older than Jane. In how many years will Ben be 3 times as old as Jane is now? 4. 3 years ago, Alice was 2 years older than Joe is now. If Joe's present age is X, what will be Alice's age 9 years from now? 5. Edward is 6 years younger than John. George is one third as old as John is now. If George will be 12 years old 4 years from now, how old is Edward now? 6. 2 years from now, Rene will be twice as old as Nancy is now. If Nancy's present age is Y, what was Rene's age 4 years ago? 7. George is 4 times as old as Sofia is now. 5 years from now, he will be 3 times as old as Sofia then. How old is Sofia now? 8. In a certain class, the number of students who have five letter or less in their last names is 4 times of the students who have more than five letters in their last names. If there are a total of 45 students, how many students are there in the class who have five letters or less in their last names? 9. There is a larger circle C with an area of 196π. You are asked to draw two circles A and B without overlapping within circle C. What is the largest possible sum of circumferences of A and B?
10. 7 years from now, Edward will be 3 times as old as Jessica is now. If Edward's present age is Y, what will be Jessica's age 3 years from now? |