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 "10 more than 9 times x"? 3. John is now 23 years old, and is 10 years older than Hillary. In how many years will John be twice as old as Hillary is now? 4. 8 years ago, Hillary was 5 years older than David is now. If David's present age is X, what will be Hillary's age 4 years from now? 5. David is 6 years younger than Eric. Richard is half as old as Eric is now. If Richard will be 11 years old 5 years from now, how old is David now? 6. 4 years from now, Andy will be 3 times as old as Niconia is now. If Niconia's present age is Y, what was Andy's age 3 years ago? 7. Eric is 3 times as old as Martha is now. 8 years from now, he will be twice 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 3 times of the students who have more than five letters in their last names. If there are a total of 44 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, Josh will be twice as old as Nancy is now. If Josh's present age is Y, what will be Nancy's age 9 years from now? |