7th Grade Review

S

100

y = 5.25x , y equals the total cost and x is the number of bracelets.  What is the constant of proportionality and what does it mean?

5.25 per bracelet

200

A:  3 cups blue, 1 cup yellow B:  27 cups blue, 9 cups yellow

Proportional relationship? Explain

Yes because Yes, both have a ratio of 3 to 1

300

How does a graph show a proportional relationship?

A straight line that runs through the origin.

400

1/3 mile in 12 minutes.  How many miles per hour?

5/3 or 1 2/3 or 20/12

500

2 girls for every 5 boys, how many girls if there are 125 boys?

50 girls

U

100

9 + (-2) =           (-9) + (-2) =

(-9) - (2) =          (-9) - (-2) = 

7                  -11

-11                -7

200

x + y=        x - y = 

if x=(-10) and y = (-14)

-24                       4

300

(-8)(-6)(-10)

-860

400

xy - z

if x= (-2), y = (6), z = (-9)

-3

500

-7 + (-36)/6 =

-13

P

100

-11/40 as a decimal

-0.275

200

Double Jeopardy

(-2/3) - (-1/2) = 

(-1/6)

300

5c - 3d - 12c + d - 6

(-7c) + (-2d) + (-6)

-7c - 2d - 6

400

Use the distributive property

-3(8x - 4)

-24x + 12

500

Find the GCF

27cd, 72cde

9cd

E

100

19 = 4x + 3

x = 4

200

-9(x-4) = 81

-5

300

Graph the solution on a number line.

8x < 40

x < 5

Open circle at 5 line to the left  <<<<<<<<<<5

400

Graph the solution on a number line. x/-2 < -6 

x > 12 

Open circle at 12 line to the right

12>>>>>>>>>>>>

500

Solve.

2x + 2 = 130

64

R

100

What is the sample space?

MATHEMATICS

MATHEICS-8 

200

Theoretical Probability is based on __?

Experimental Probability is based on __?

Facts, what could/should happen

Results of an experiment, what DID happen

300

What is the theoretical probability of getting a sum of a 6 if 2 dice were thrown?

5/36

400

These letters were in a bag CHATELLE  What is the theoretical probability of picking the letter L as a percent?

2/8 = 25%

500

Draw a tree diagram for the compound event:  Rolling a die, then flipping a coin

12 outcomes