Algebra( Week 21 Evaluation) 1. If 9x 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 "9 less than 12 times x"? 3. Ed is now 21 years old, and is 6 years older than Laura. In how many years will Ed be twice as old as Laura is now? 4. 5 years ago, Jessica was 2 years older than Kevin is now. If Kevin's present age is X, what will be Jessica's age 10 years from now? 5. Richard is 6 years younger than Ed. Ben is half as old as Ed is now. If Ben will be 10 years old 3 years from now, how old is Richard now? 6. 8 years from now, Curtis will be 4 times as old as Helen is now. If Helen's present age is Y, what was Curtis's age 7 years ago? 7. Michael is 3 times as old as Nancy is now. 6 years from now, he will be twice as old as Nancy then. How old is Nancy 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 100π. 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, Curtis will be 3 times as old as Jennifer is now. If Curtis's present age is Y, what will be Jennifer's age 2 years from now? |