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

Solve using substitution or elimination

100

Solve: 

2x-3y=-1

y=x-1

(4,3)

200

y=5x-7

-3x-2y=-12

(2,3)

300

-7x-2y=-13

x-2y=11

(3,-4)

400

X+3y=1

-3x-3y=-15

(7,-2)

500

-2x+6y=6

-7x+8y=-5

(3,2)

X and y Intercept

100

Find the x & y intercept:

X-2y=-10

(-10,0) (0,5)

200

3x-y=9

(3,0) (0,-9)

300

6x-y=12

(2,0) (0,2)

400

2x+3y=6

(3,0) (0,2)

500

7x+5y=42

(6,0) (0,42/5)

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