Algebra( Week 21 Evaluation) 1. If 25x 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 12 times x"? 3. Edward is now 21 years old, and is 6 years older than Niconia. In how many years will Edward be twice as old as Niconia is now? 4. 5 years ago, Alice was 5 years older than Rene is now. If Rene's present age is X, what will be Alice's age 5 years from now? 5. Josh is 5 years younger than Rene. Jay is half as old as Rene is now. If Jay will be 10 years old 4 years from now, how old is Josh now? 6. 2 years from now, Edward will be 3 times as old as Hillary is now. If Hillary's present age is Y, what was Edward's age 5 years ago? 7. Richard is 3 times as old as Niconia is now. 9 years from now, he will be twice as old as Niconia then. How old is Niconia 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 40 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. 6 years from now, Ben will be 3 times as old as Nancy is now. If Ben's present age is Y, what will be Nancy's age 8 years from now? |