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 "10 more than 8 times x"? 3. George is now 17 years old, and is 9 years older than Jessica. In how many years will George be 3 times as old as Jessica is now? 4. 5 years ago, Julia was 3 years older than Rene is now. If Rene's present age is X, what will be Julia's age 7 years from now? 5. Eric is 5 years younger than Richard. Ed is half as old as Richard is now. If Ed will be 15 years old 7 years from now, how old is Eric now? 6. 8 years from now, Tom will be twice as old as Nancy is now. If Nancy's present age is Y, what was Tom's age 4 years ago? 7. Larry 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 4 times of the students who have more than five letters in their last names. If there are a total of 55 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. 6 years from now, Andy will be twice as old as Nancy is now. If Andy's present age is Y, what will be Nancy's age 5 years from now? |