Review for Chapter #2 Test

Symbols

100

Which symbol means "less than"?

<

300

What kind of circle is "at least"?

close circle

500

Graph the equation if you have 

"x ≥ -7"

             ● ---------------------------->

< --  -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 -->

Sentence into Equation

100

 A number x is no more than 14.

x ≤ 14

300

Twice a number, x, minus 1.6 is less than 9.

2x - 1.6 < 9

500

Convert this equation into a sentence.
 -2x ≥ 18

Negative two times a number x is greater than or equal to eighteen.

Solving Inequalities

100

Solve the equation 

-2x ≥ 18

x ≤ -9

300

Find the value of x in the equation 

2x - 4 ≥ 8

x ≥ 6

500

Solve 6x - 20 < 4x - 8

x < 6

Solving Compound Inequalities

100

Graph the compound inequalities 

"5 ≤ x ≤ 7"

   ●---●

< --  0 1 2 3 4 5 6 7 8 9 10 11-->

300

Solve the equation 

"x - 4 ≤ -2 or x + 7 ≥ 12"

 x ≤ 2 or x ≥ 5

500

Solve the equation 

" -12 ≤ -3x + 9 ≤ -6 "

5 ≤ x ≤ 7

Word Problem

100

Maria has $1.50 in her wallet. She needs less than $6.20 altogether. Let x represent the amount of money she receives from her friend.

x + 1.5 < 6.2

Give a number that would not be a solution to the inequality.

Any number greater than or equal to 4.7

x ≥ 4.7

300

A new bicycle costs $180. Jordan already has $60 and saves $20 each week.

Question: How many weeks does Jordan need to save to buy the bicycle? Solve the equation

w ≥ 6

500

You are going on a school trip that costs between $200 and $260. You already have $80 saved and plan to save the same amount each week for the next 4 weeks. Let x represent the amount you save each week. Create a compound inequality.

200 ≤ 80 + 4x ≤ 260