Algebra( Week 21 Evaluation) 1. If 15x is deducted by 18y, 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 7 times x"? 3. Edward is now 18 years old, and is 7 years older than Martha. In how many years will Edward be twice as old as Martha is now? 4. 3 years ago, Laura was 3 years older than Edward is now. If Edward's present age is X, what will be Laura's age 6 years from now? 5. Edward is 6 years younger than John. George is one third as old as John is now. If George will be 15 years old 7 years from now, how old is Edward now? 6. 7 years from now, Curtis will be 5 times as old as Niconia is now. If Niconia's present age is Y, what was Curtis's age 2 years ago? 7. David is 3 times as old as Sofia is now. 9 years from now, he will be twice as old as Sofia then. How old is Sofia 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 36 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. 2 years from now, Steve will be 4 times as old as Niconia is now. If Steve's present age is Y, what will be Niconia's age 5 years from now? |