Algebra "Review" A

Order of Operation

100

(7 x 4) + 5=

33

200

3 x (5 + 1) +3

21

300

4(4-:2+4)

24

400

(6-4) * 49 -:7=

14

500

7(2+3) - 2 x 2²=

27

Combining Like Terms

100

7n + 5n + 10mn + 2mn

12n + 12mn

200

3x + 4x² - 2x² - 5x

2x² - 2x

300

20x - 5x + 7y - y

15x + 6y

400

5n - 8 - 20n + 3

-15n - 5

500

2(4a - 9b) - 2a + 6

6a - 18b + 6

Properties

100

12 x 1 = 12

Identity property

200

7+(2+9) = (7+2)+9

Associative propery

300

2(x+y)=2x+2y

Distributive 

400

10 + 8 = 8 + 10

Commutative 

500

12+0=12

Identity Property

Equations

100

x - 15 = 5

x=20

200

7(9 + x) = 84

x=3

300

7x + 7 = 56

x=7

400

5x - 14 = 8x + 4

x=-6

500

3(2 + x) = 4(x - 5)

x=26

Slope

100

(2,5) (4,11)

m=3

200

(1,5)(4,11)

m=2

300

(7,5) (13,10)

m=5/6

400

(1,-19) (-2,-7)

m=-4

500

(19,-2) (-11,10)

m=-2/5