Quiz 2 - Speech or Presentation Example

MATH 009 ______________________________ Quiz 2: Answer Sheet Instructions: This is an open-book quiz. You may refer to your text and other course materials as you work on the quiz. Do NOT use a calculator.Record your answers and work in this document. Save the file as Lastname_Firstname_Quiz2.There are 14 problems.Problems #1 - 14 are short answer with work required. You may use either of the following method to do the quiz 2.1. Type your work using plain-text formatting or an equation editor in MS Word document.2. Hand-write your work and scan it to a PDF file.

Show work neatly, when needed. You may have to write steps of the solution or justify your answer to get credit. You must use Lastname_Firstname_quiz2 file to provide your solutions. If you are planning to use MS Word document download the MS Word document Lastname_Firstname_quiz1 and type your solutions. Save it using your last name and first name. If you are planning to hand write your work, download the PDF document, Lastname_Firstname_quiz2 and write your solutions neatly. Scan it and save it as YourLastName_YourFirstName_quiz2.

In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages. You must submit a single file in commonly used formats for example word processing or PDF. Do not submit JPEG or any other image files.You must complete the quiz individually. Neither collaboration nor consultation with others is allowed. Your quiz will receive a zero grade unless you complete the following honor statement.

Please sign (or type) your name below the following honor statement: I have completed this quiz myself; working independently and not consulting anyone except the instructor. I have neither given nor received help on this quiz. Name _____________________ Date___________________Problem NumberSolution1Answer: 40 pointsWork: to find the total points for the week, we add the points for Monday, Wednesday, Friday and Saturday:18 + 7 + 13 + 2 = 25+15 = 40 points 2Answer: -13Work:Since |13| is positive, it can be written simply as 13For any given number a, the additive inverse is given by a × -1The additive inverse will be 13 × -1 = -133Answer: 17Work: 4 + (-7) - (-20) Since multiplication of two negatives gives a positive, the expression can be simplified as below: 4 + (-7) + 20 = 4 -7 + 20 = 174 Answer: -7Work:Since x = 5, y = -2, and t = 8, we substitute the given values for x and y in the equationThis gives: y – x = -2-5= - (2+5) = -75Answer: -16Work:The total change in the price of stock will be given by the summation of all the changesA drop in the price is treated as a negative value during the summationThis can be expressed as +9 + (-14) + (-11) = 9 – 14 – 11 = 9 – 25 = -16.

This means that the stock total change was -16 meaning a fall of 16 points.6Answer: 10Work:Subtract -7 from 3 is expressed as:3- (-7), however when opening the bracket, the multiplication of the two negative signs gives a positiveThe expression thus becomes: 3+7 = 107Answer: -70Work:Multiplying 7 by -10 can be expressed as 7 × 10 × (-1) = 70 × -1 = - 70. When a positive and a negative number are multiplied, the result is negatuive8Answer: ¼Work:Reciprocal of a number a is given by 1/a Therefore, for this case, this will give 1/49Answer: 7Work:-42/-6 can be rewritten as-42/1 ÷ -6/1= -42/1 × -1/6Since two negative fractions are being multiplied, the result is a positive hence: 42/1 × 1/6= 42 × 1/6 = 42/6 = 710Answer: -5Work:-45/4+5Since the denominator is 4+5, this can be simplified to 4+5 = 9Hence -45/9Since a negative number is being divided by a positive number, the result become negative hence-45/9 = -511Answer: -$732.

3Work:If the company posted -$244.1bilion last year, after three years, the net income will be given by the multiplication of the income in the first year by three. this is expressed as: -$244.1×3= -$732.3 billion or a loss of $ 732.3 billion12Answer: x + 22 + x = According to the cumulative property: a + b = b + aTherefore for the expression above: 2 + x= x + 213Answer: -9x – 9yWork:According to the distributive property: a(b + c) = ab + ac For the given expression -9(x + y), opening of the brackets gives: -9x + -9y = -9x – 9y14Answer: Opposite: 19Reciprocal: -1/19Work:Since the opposite of a number a is given by a × -1, for -19 it will be : -19 × -1 = 19The reciprocal of any number a is 1/a , this gives 1/-19 = -1/19