Unit 7 Lesson: 4 Exercise 2

1)The arithmetical mean of three numbers is greater than 11 the first number is –4, the second is 30 and the third is n. How big is n?

2) Think of a number, if the number is a whole number less than 5 what is that number?

4) The result of doubling a number is at least 10. What is the number?

4) 4 is added to three times a certain number , the result is not more than when twice that number is added to 10. Find the possible range of values of the number.

5) When 9 is subtracted from a number and the result tripled, the answer is not more than 6 what is the number?

6) When 5 is added to four times a certain number, the result is at least twice that number added to 19. What is the number?

7) Keith has $500 in a savings account at the beginning of the summer. He wants to have at least $200 at the end of the summer. He withdraws $25 per week for food, clothing, and movie tickets. How many weeks can Keith withdraw money from his account?

8) A taxi charges a flat rate of $1.75, plus an additional $0.65 per mile. If Erica has at most $10 to spend on the cab ride, how far could she travel?

9) Pet Supplies makes a profit of $5.50 per bag on its line of natural dog food. If the store wants to make a profit of no less than $5225, how many bags of dog food does it need to sell?

10) Chris wants to order DVD’s over the internet. Each DVD costs $15.99 and shipping the entire order costs $9.99. If he can spend no more than $100, how many DVD’s could he buy?