2.1.5 to 2.1.7 review

simplify expressionssimplificar expresiones

100

9y + 6 - 7y - 3

2y + 3

200

-8 + 4x + -x - 6 + 12

3x - 2

300

3x + 2y - 2x + 6 

2y + x + 6 

400

(-8c² - 9c + 9) + (-5c² - 8c -6) 

-13c² - 17c + 3

500

-9p² - 9p² - 2p² - 2 - 5p 

-20p² - 5p - 2 

perimeter & areaperímetro y área

100

pg 1 on google doc

find the area/ encontrar el área

x² + 2x + 1

200

pg 2 on google docs

find the perimeter/ encontrar el perímetro

6x + 6 

300

pg 5 on google docs

find the area/ encontrar el área

2x + 5

400

pg 4 on google docs

find the area/ encontrar el área

y² + xy + 3 

500

pg 3 on google docs 

find the perimeter/ encontrar el perímetro

4x + 6 

evaluate expressionsevaluar expresiones

100

y + y - x

x= 6, y= 5

4

200

z² - y

z= 3, y= 4

5

300

m + 5q

m= 1, q= 5

26

400

b(4+a)

b= 2, a= 6 

20

500

(y-x)³ 

x= 1, y= 3

8

what legal move was made?¿Qué medida legal se hizo?

100

pg 6 on google docs

made zeros

200

pg 7 on google docs

moved tiles from '-' region to '+' region

300

pg 8 on google docs

removed identical tiles

400

pg 9 on google docs

are all of the moves legal? 

no! they correctly removed 2x from both sides and flipped a 1 (unit tile) from "-" region to "+" region, and removed a zero. However, on the left side, the -1 and +1 in the "-" region do not make zero. 

500

(3x + x + 8) + 10

4x + 18 

combined like terms 

which is greater?cual es mayor?

100

pg 10 on google docs

they are equal

200

pg 11 on google docs

left side

300

-1 + 6y - 2 + 4x - 2y

OR 

x + 5y - (-2 + y) + 3x - 6

left side

400

pg 12 on google docs

right side 

500

5 - (2y - 4) - 2 

OR 

-y-(1 + y) + 4

left side