Algebra( Week 21 Evaluation) 1. If 20x is deducted by 15y, 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 more than 4 times x"? 3. Ed is now 9 years old, and is 5 years older than Jessica. In how many years will Ed be 3 times as old as Jessica is now? 4. 6 years ago, Alice was 5 years older than Michael is now. If Michael's present age is X, what will be Alice's age 9 years from now? 5. Ben is 6 years younger than Josh. Rene is half as old as Josh is now. If Rene will be 14 years old 6 years from now, how old is Ben now? 6. 4 years from now, Andy will be 4 times as old as Emily is now. If Emily's present age is Y, what was Andy's age 10 years ago? 7. John is 3 times as old as Sofia is now. 8 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 5 times 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 196π. 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, Joe will be 5 times as old as Mary is now. If Joe's present age is Y, what will be Mary's age 9 years from now? |