Algebra( Week 21 Evaluation) 1. If 10x is deducted by 12y, 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 "7 less than 6 times x"? 3. Steve is now 19 years old, and is 8 years older than Nancy. In how many years will Steve be twice as old as Nancy is now? 4. 7 years ago, Nancy was 3 years older than Ed is now. If Ed's present age is X, what will be Nancy's age 2 years from now? 5. David is 4 years younger than Eric. Richard is half as old as Eric is now. If Richard will be 14 years old 7 years from now, how old is David now? 6. 8 years from now, Michael will be twice as old as Hillary is now. If Hillary's present age is Y, what was Michael's age 7 years ago? 7. Curtis is 3 times as old as Helen is now. 7 years from now, he will be twice as old as Helen then. How old is Helen 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 48 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. 3 years from now, Josh will be 5 times as old as Niconia is now. If Josh's present age is Y, what will be Niconia's age 7 years from now? |