Scavenger+Hunt+Answer+Key

Scavenger Hunt Answer Key

Jackellyn Carcamo
= Math History =

Question: 1. What is an [|abacus]?


 * Answer: The abacus is an ancient tool used for counting, with the Russian version being specifically designed **
 * for counting rubles and kopeks. The simple design uses a set of framed rods and a series of beads **
 * that are moved back and forth across the rods to conduct the count **

Question 2. Who was aware of the Pythagorean Theorem?

B. Chinese, Moroccans, and Americans C. Japanese, Australians and Serbians D. Indian civilizations, Greeks and Americans
 * A. Greeks, the Babylonian, Chinese, and Indian civilizations**

Question 3. In what century and country was the construction of the metric system?

A. 20th, France B. 16th, USA D. 18th, USA
 * C. 18th, France**

Factoring
1. Which of the following is a composite number?
 * B. 14**

A composite number is a number that can be written as the product of two positive integers other than 1 and the number itself. For example: 14 is a composite number because it can be written as 7 times 2. In this case, 7 and 2 are called factors of 14.

2. What does (x-4)(x+5) factor out to?
 * C. //x//² + x - 20**

(x - 6)(x + 3) = x2 - 6x + 3x - 18 = x2 - 3x - 18 (**Note:** this question isn't the same as the example from the website) (x-4)(x+5) = x2 + 5x - 4x - 20 =  x2 + x - 20

3. What does 2//x//² + 7//x// − 15 factor into?
 * A. (2//x// − 3)(//x// + 5)**

2//x//² + 7//x// − 15 = (2//x// − 3)(//x// + 5)

Imaginary Numbers
1. What is //i// equal to?
 * D. √-1**

A basic definition of an imaginary number located across many books, websites, and other math resources.

2. What is (2//i//)(4//i//)?
 * C. -8**

(2i)(4i) = (2*4)*(i*i) = 8*(i*i) = 8*(-1) = -8

3. What is //i// raised to the 501st power?
 * B. //i//**

This was an example directly from the video but here it is worked out as well. //i//^501 = //i//^500 *//i//^1 = //(i//^4)^25 * //i//^1 = 1 * //i//^1 = 1* //i// = //i//

1. Which of the following is a composite number?A. 11B. 14C. 3D. 23[|Composites]

** Linear Equations **
** 2. What does (x-4)(x+5) factor out to? ** 1. Which of the following is NOT a linear expression?
 * A. x²**

2. To solve an equation you must:
 * C. Get the variable alone on one side.**

3. What is an equation called when it has no solution? A. x-4x2 +9B. x2 +9x-20C. x2 +x-20D. x2-x-20 [|Trinomial Factoring]
 * A Contradiction**

**Brittany Nichols** **Graphing**

1. A line graph describes how things change over
 * Answer: A line graph describes how things change over time.**

2. For the coordinates (0,10), the o is on which axis?
 * Answer: The 0 is on the x-axis.**

The first part of an ordered pair in this case, 0 will always be on the x-axis, while the second part in this case, 10 will always be on the y-axis.

3. To which quadrant does this ordered pair, (-5,2) belong?
 * Answer: c) II (2)**

As explained in the video quadrant 2 belongs to those whose ordered pairs are a negative and a positive (in that order).

Logarithms
1. A logarithm is the ___ of/as an [|exponent] ? a) same
 * b) opposite**

2. Which one is [|correct]? a) 4= log 2 8 b) 2= log 2 8 d) 0=log 2
 * c) 3=log 2 8**

3. x = //b^y// is the [|same]as y = logb(x)? Where b is the base of the logarithm.

b) False
 * a) True**

3. What does 2//x//² + 7//x// − 15 factor into?A. (2//x// − 3)(//x// + 5)B. (2//x// + 3)(//x// - 5)C. (2//x// − 5)(//x// + 3)D. (2//x// + 5)(//x// - 3)[|Factoring Trinomials]