Algebra Review

PEMDAS

100

4 + 2 x 3

10

200

 (4 + 2) + 3 x 1

9

300

(5 x 2 ) + (9 x 2)

28

400

(3² + 1) x 4

40

500

5² + 4 x 3

37

Adding with Negative Numbers

100

(-4) + 7

3

200

(-15) + (-13)

-28

300

(-10) + 3

-7

400

(-4) + (-16)

-20

500

(-32) + 12

-20

Subtracting with Negative Numbers

100

11 - (-10)

21

200

(-12) - 5

-17

300

(-13) - (-8)

-5

400

25 - (-5)

30

500

(-13) - 12

-25

Mean, Median, Mode, Range

100

What is the mode of the following data set:

16, 15, 15, 15, 17, 16, 18

15

200

What is the range of the following data set:

16, 15, 15, 15, 17, 16, 18

3

300

What is the median of the following data set:

16, 15, 15, 15, 17, 16, 18

16

400

What is the mean of the following data set:

16, 15, 15, 15, 17, 16, 18

16

500

What are the steps to find the mean, median, mode, and range of a data set?

Mean: add all the # in the data set and divide by the total # in the data set

Median: list the numbers least to greatest, cross off until one # is left in the middle

Mode: find the # that occurs the most

Range: subtract the largest value and the smallest value; the answer is the range

Solving for a Variable (x)

100

x - 6 = 11

What is x?

17

200

2x + 3 = 9

What is x?

x = 3

300

3x + 1 = x + 5

What is x?

x = 2

400

x + x + x = 15

What is x?

x = 5

500

14 = 2x

What is x?

x = 7