Quiz 1 Jeopardy

Miscellaneous

100

What is more: The number of feet in a mile, or the number of pounds in a ton?

Feet in mile

200

“Obelus” is a symbol that has a horizontal line with a dot above it and a dot below it, what does this symbol represent?

Division

300

What is the only PRIME number that is also EVEN?

Two (2)

400

Google (the search engine) was named after a number called “Googol”. What is a Googol?

1 with a hundred zeroes after it (1 x 10¹⁰⁰)

500

What mathematical theory explains the randomness of nature?

The Butterfly Effect

Substitution

100

y = 2x + 3

y + 2x = 11

(2,7)

200

3x + y = 7

-4x + 3y = 60

(-3, 16)

300

2x - 2y = 10

-3y + 4x = 17

(2, -3)

400

3x + 1/2y = 14

-2x - 4y = -24

(4, 4)

500

-1/2x + 1/3y = 15

x - y = 10

(-110, -120)

Elimination

100

-2x + 2y = 10

2x + 3y = 15

(0, 5)

200

10x + 6y = 20

10x +4y = 10

(-1, 5)

300

2x - 4y = 10

3x + 8y = 8

(4, -0.5)

400

2x + 4y = 3

3y + 7x = 6

(0.68, 0.41)

500

-1/2x + 5/2y = 10

4y + 2x = 8

(-2.86, 3.43)

Absolute-Value

100

|x + 3| = 4

X = 1 or x = -7

200

|6 + 3x| = 9

X = -5 or x = 1

300

9|x - 4| < 81

-5 < x < 13

400

|x - 12| / 4 < 1

8 < x < 16

500

-5/8|3x + 5| < -5

x > 3 or x < -13/3 

Linear Inequalities

100

Is the inequality y > 2x - 2 a dotted line or a solid line?  Will it be shaded above or below?

Dotted line, shaded above

200

Solve 16x + 8y > -32 for y

y > -2x - 4

300

Solve 3/4(5x - y) < 3 for y

y > 5x - 4

400

5(5x - 4) < 3(2 + 8x) - 17

X < 9

500

A music store is selling posters and CDs.  Each poster gives a profit of $3.00 and each CD gives a profit of $5.00.  The store needs to make a profit of more than $200 per hour to stay in business.  Let x represent the number of posters sold and y represent the number of CDs sold.  Write an inequality showing how many of each item (posters and CDs) the store needs to sell per hour to make a sufficient profit.

3x + 5y > 200