Reference no: EM132252754

Assignment - Math Quiz

Please remember to show ALL of your work on every problem.

1) Simplify the following expression: 45 - 5(3²-4²).

2) Simplify the following expression: |15 - 42|/(11 + 4(-5)).

3) Simplify the expression: (-7(-3) + (-3)²)/(-5(4-7)).

4) Simplify the expression: (-12²÷3·(-4))/(6[8-12]).

5) Evaluate the expressions below for x = -3 and y = -5.

a) 5x² + y²

b) 5x² - y²

6) Solve the equation below and show the check of your answer.

y - 12 = -22

7) Solve the equation below and show the check of your answer.

-56 = 8w

8) Solve the equation below and show the check of your answer.

n/7 = -12

9) The top of a mountain has an altitude of 14,443 feet above sea level and the bottom of a valley nearby is at 149 feet below sea level. Answer each of the following questions, including units with all answers.

a) Find the difference between these two elevations.

b) Round your answer from part (a) to the nearest 10 feet.

c) Round your answer from part (a) to the nearest 100 feet.

d) Round your answer from part (a) to the nearest 1000 feet.

e) Round your answer from part (a) to the nearest 10,000 feet.

10) Jackson's scores on the first four algebra quizzes are 79, 88, 95, and 71. What score must he earn on the fifth quiz to earn an average quiz score of 85? Please set up and solve this problem following the steps below:

a) Define the unknown quantity in terms of one variable.

b) Translate the question into an equation.

c) Solve the equation, showing all work.

d) Write a complete answer to the question asked.

11. The lowest temperature on a winter morning was -8^oF. Later that same day the temperature reached a high of 24^oF. By how many degrees Fahrenheit did the temperature increase?

12. If the total cost of x apples is b cents, what is a general formula for the cost, in cents, of y apples?

13. Answer the following problem: 54 - 6 ÷ 2 + 6 = ?

14. Mr. Brown went grocery shopping to buy meat for his annual office picnic. He bought 7 3/4 pounds of hamburger, 17.85 pounds of chicken, and 6 1/2 pounds of steak. How many pounds of meat did Mr. Brown buy?

15. A total of 50 juniors and seniors were given a mathematics test. The 35 juniors attained an average score of 80 while the 15 seniors attained an average of 70. What was the average score for all 50 students who took the test?

16. Answer the following problem: 2 - (-9) - 8.

17. Answer the following problem: 7 × 7 - (8 - 2).

18. Answer the following problem: h + j(j - h); use h = 2, and j = 6.