Algebra( Week 21 Evaluation) 1. If 9x is deducted by 6y, 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 6 times x"? 3. Tom is now 24 years old, and is 8 years older than Emily. In how many years will Tom be twice as old as Emily is now? 4. 5 years ago, Emily was 5 years older than Josh is now. If Josh's present age is X, what will be Emily's age 7 years from now? 5. George is 4 years younger than Kevin. David is one fourth as old as Kevin is now. If David will be 13 years old 5 years from now, how old is George now? 6. 5 years from now, Tom will be 5 times as old as Susan is now. If Susan's present age is Y, what was Tom's age 5 years ago? 7. John is 3 times as old as Jennifer is now. 5 years from now, he will be twice as old as Jennifer then. How old is Jennifer now? 8. In a certain class, the number of students who have five letter or less in their last names is twice of the students who have more than five letters in their last names. If there are a total of 18 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 64π. 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. 4 years from now, Andy will be twice as old as Anne is now. If Andy's present age is Y, what will be Anne's age 4 years from now? |