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 less than 3 times x"? 3. Rene is now 11 years old, and is 5 years older than Julia. In how many years will Rene be 3 times as old as Julia is now? 4. 2 years ago, Niconia was 4 years older than Curtis is now. If Curtis's present age is X, what will be Niconia's age 7 years from now? 5. Richard is 4 years younger than Ed. Ben is half as old as Ed is now. If Ben will be 13 years old 5 years from now, how old is Richard now? 6. 8 years from now, Curtis will be 3 times as old as Julia is now. If Julia's present age is Y, what was Curtis's age 7 years ago? 7. Eric is 3 times as old as Niconia is now. 8 years from now, he will be twice as old as Niconia then. How old is Niconia now? 8. In a certain class, the number of students who have five letter or less in their last names is 4 times of the students who have more than five letters in their last names. If there are a total of 55 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. 2 years from now, Steve will be 5 times as old as Martha is now. If Steve's present age is Y, what will be Martha's age 10 years from now? |