Algebra( Week 21 Evaluation) 1. If 15x 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 "7 more than 5 times x"? 3. Curtis is now 15 years old, and is 9 years older than Niconia. In how many years will Curtis be 3 times as old as Niconia is now? 4. 5 years ago, Emily was 5 years older than Tom is now. If Tom's present age is X, what will be Emily's age 7 years from now? 5. Ed is 3 years younger than Ben. Josh is one third as old as Ben is now. If Josh will be 15 years old 7 years from now, how old is Ed now? 6. 8 years from now, Tom will be 4 times as old as Nancy is now. If Nancy's present age is Y, what was Tom's age 4 years ago? 7. Nick is 4 times as old as Sofia is now. 7 years from now, he will be 3 times 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 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, Smith will be 5 times as old as Laura is now. If Smith's present age is Y, what will be Laura's age 3 years from now? |