Algebra( Week 21 Evaluation) 1. If 16x is deducted by 20y, 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 "5 more than 4 times x"? 3. Michael is now 23 years old, and is 9 years older than Jane. In how many years will Michael be twice as old as Jane is now? 4. 2 years ago, Jessica was 4 years older than Jay is now. If Jay's present age is X, what will be Jessica's age 4 years from now? 5. George is 6 years younger than Kevin. David is one third as old as Kevin is now. If David will be 13 years old 6 years from now, how old is George now? 6. 3 years from now, Andy will be twice as old as Alice is now. If Alice's present age is Y, what was Andy's age 6 years ago? 7. Josh is 4 times as old as Martha is now. 10 years from now, he will be 3 times as old as Martha then. How old is Martha now? 8. In a certain class, the number of students who have five letter or less in their last names is 5 times of the students who have more than five letters in their last names. If there are a total of 72 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 144π. 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. 2 years from now, Tom will be 5 times as old as Helen is now. If Tom's present age is Y, what will be Helen's age 5 years from now? |