Algebra( Week 21 Evaluation) 1. If 20x is deducted by 16y, 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 less than 8 times x"? 3. Michael is now 20 years old, and is 8 years older than Niconia. In how many years will Michael be twice as old as Niconia is now? 4. 4 years ago, Morgan was 5 years older than Rene is now. If Rene's present age is X, what will be Morgan's age 6 years from now? 5. Edward is 4 years younger than John. George is one fourth as old as John is now. If George will be 14 years old 8 years from now, how old is Edward now? 6. 7 years from now, Ben will be 4 times as old as Martha is now. If Martha's present age is Y, what was Ben's age 5 years ago? 7. Nick is 3 times as old as Hillary is now. 10 years from now, he will be twice as old as Hillary then. How old is Hillary 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 60 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. 6 years from now, Eric will be twice as old as Mary is now. If Eric's present age is Y, what will be Mary's age 4 years from now? |