MathQuiz
juicypredatore
jorfeo20math2000920midterm20exam.docxMath 009
Midterm Exam Page 7
Math 009 Midterm Exam
Professor: Jillian Orfeo
Name________________________________
Instructions:
· The exam is worth 75 points. There are 15 problems, each worth 5 points. Your score on the exam will be converted to a percentage and posted in your assignment folder with comments.
· This exam allows open book and open notes, and you may take as long as you like on it provided that you submit the exam no later than the due date posted in our course schedule of the syllabus. You may refer to your textbook, notes, and online classroom materials, but you may not consult anyone.
· You should show all of your work to receive full credit. If you do not show work, you may earn only partial or no credit.
· Please type your work in your copy of the exam, or if you prefer, create a document containing your work. Scanned work is also acceptable. Be sure to include your name in the document. Review instructions for submitting your exam in the Exams Module.
· If you have any questions, please contact me by e-mail ([email protected]).
At the end of your exam you must include the following dated statement with your name typed in lieu of a signature. Without this signed statement you will receive a zero.
I have completed this exam myself, working independently and not consulting anyone except the instructor. I have neither given nor received help on this exam.
Name: Date:
Please remember to show all work on the exam.
1) Solve the equation. Show all work and show the complete check of your answer:
2) Solve the equation. Show all work and show the complete check of your answer. Start by multiplying both sides of the equation by the least common denominator to clear all fractions:
3) Solve the equation. Show all work and show the complete check of your answer:
5) Solve the equation. Show all work and show the complete check of your answer:
-9x + 6 = -21
6) Solve the equation. Show all work and show the complete check of your answer:
3x + 17 = 35
7) Simplify the following expression:
8) Simplify the following expression:
-5 (2x – 4) + 4 (5x – 7)
9) Alexis paid $21,750 as a down payment for her new home. If the down payment was 15% of the total price of the house, what was the total price of the house? Start by defining the unknown in terms of a variable; then write an equation based on the information given and show all work as you solve the equation.
10) In a sample of 350 new iPhones, 3 were found to be defective. At this rate, how many defective iPhones would be expected in a sample of 1400 new iPhones? Use a proportion to set up and solve this problem.
11) Translate the question below into an equation. Then solve the equation, showing all work.
5.8% of 2400 is what number?
12) Jackson’s annual salary is $57,500. He has been promised a 5.4% merit raise in the year ahead. Find the amount of the raise and the new salary. Show all work.
13) Translate the question below into an equation. Then solve the equation, showing all work.
What percent of 450 is ?
14) Fifteen UMUC students are chosen at random to participate in a survey. The first question on the survey asks how old each participant is. The fifteen responses are:
22, 39, 35, 47, 41, 65, 35, 18, 29, 56, 57, 21, 43, 49, and 73
Find the mean age of the students surveyed. Show all work.
Find the median of the ages. Explain how you found your answer.
Find the mode of the ages. Explain how you found your answer.
15) Mark borrows $22,000 to buy a new car. If the simple interest rate on the car loan is 8.25% and he pays off the loan in 6 years, how much interest does he pay?
End of exam: please do not forget to write and sign (or type) the required statement explained in the box on page 1 of the exam.
(
)
(
)
144523
yy
+-=-
(
)
1.80.50.62
ww
-+=+
4
3
x
=
5
6
y
=-
2
12
xy
(
)
12324
427
--
+-
