Algebra( Week 21 Evaluation) 1. If 6x is deducted by 8y, 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 "8 more than 7 times x"? 3. David is now 16 years old, and is 9 years older than Jane. In how many years will David be 3 times as old as Jane is now? 4. 8 years ago, Emily was 3 years older than George is now. If George's present age is X, what will be Emily's age 7 years from now? 5. George is 3 years younger than Kevin. David is one third as old as Kevin is now. If David will be 11 years old 3 years from now, how old is George now? 6. 4 years from now, Ed will be 3 times as old as Emily is now. If Emily's present age is Y, what was Ed's age 4 years ago? 7. Steve is 4 times as old as Hillary is now. 6 years from now, he will be 3 times as old as Hillary then. How old is Hillary 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 35 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 100π. 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, Michael will be twice as old as Anne is now. If Michael's present age is Y, what will be Anne's age 2 years from now? |