Ch 8 Go Math Review

Simplifying Expressions

100

3x+5x−7

8x−7

200

4(2y+3)

8y+12

300

6a+4b−2a+3b

4a+7b

400

2(3m−4)+5m

11m−8

500

2(3p+5)−3(2p−1)

13

Writing Equations

100

18 more than a number is 29

n + 18 = 29

200

128 less than a number is 452

n - 128 = 452

300

18 more than the product of 3 and a number

18 + (3n) or 18 + 3n

400

Four fifths of a number equals 11

4/5n = 11

500

5.2 times the sum of 3 and a number

5.2 x (3+n)

Solving Equations

100

x+6=14

x = 8

200

3x = 21

x = 7

300

y - 9 = 5

y = 14

400

z/4 = 6

z = 24

500

2/3 n = 7/8

n = 1 5/16

Is x=21?

100

3x=63

Yes!

200

x/21=2

No!

x = 42

300

x - 80 = 59

No!

x=139

400

Mia makes $3 for every bracelet she sells. She sells 7 bracelets and makes x amount of dollars.

Yes! 

x = $21 LABEL!!!

500

Danny and Carly like to work on jigsaw puzzles. Danny has two puzzles. If together they have 9 puzzles, then we can use the equation x + 2 = 23 to determine how many puzzles (X) Carly has. How many puzzles does Carly have?

x = 21 puzzles

Graphing Inequalities

100

x ≤ 4

Closed circle at 4

Shade to the left

200

x > −1

Open circle at -1

Shade to the right

300

x ≤ 2

Closed circle at 2

Shade to the left

400

x > −2

Open circle at -2

Shade to the right

500

x ≤ |-5|

Closed circle at 5 (absolute value is ALWAYS positive)

Shade to the left