Algebra( Week 21 Evaluation) 1. If 16x 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 "5 less than 6 times x"? 3. Kevin is now 18 years old, and is 10 years older than Emily. In how many years will Kevin be 3 times as old as Emily is now? 4. 6 years ago, Helen was 3 years older than Smith is now. If Smith's present age is X, what will be Helen's age 10 years from now? 5. Rene is 6 years younger than Jay. Michael is half as old as Jay is now. If Michael will be 13 years old 8 years from now, how old is Rene now? 6. 2 years from now, Ben will be 4 times as old as Sofia is now. If Sofia's present age is Y, what was Ben's age 10 years ago? 7. Ben is 3 times as old as Emily is now. 10 years from now, he will be twice as old as Emily then. How old is Emily 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 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 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. 8 years from now, Ed will be 4 times as old as Emily is now. If Ed's present age is Y, what will be Emily's age 5 years from now? |