Algebra( Week 21 Evaluation) 1. If 25x is deducted by 20y, 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 "10 less than 8 times x"? 3. Steve is now 9 years old, and is 5 years older than Mary. In how many years will Steve be 3 times as old as Mary is now? 4. 5 years ago, Jessica was 4 years older than Nick is now. If Nick's present age is X, what will be Jessica's age 4 years from now? 5. Rene is 5 years younger than Jay. Michael is one third as old as Jay is now. If Michael will be 14 years old 9 years from now, how old is Rene now? 6. 8 years from now, Curtis will be twice as old as Jane is now. If Jane's present age is Y, what was Curtis's age 4 years ago? 7. Ed is 3 times as old as Niconia is now. 5 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 50 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. 8 years from now, Nick will be twice as old as Julia is now. If Nick's present age is Y, what will be Julia's age 9 years from now? |