Green 1 Homework Quiz #4

 $-5\left(1+7x\right)>100$  
Solve. 

•  $x<-21$  

•  $x<-3$  

•  $x>21$  

•  $x>-3$  

Tags

CCSS.7.EE.B.4B

You just solved $-5\left(1+7x\right)>100$  

The answer was  $x<-3$  

 Write this in interval notation. 

•  $\left(-3,\ -\infty\right)$  

•  $\left(-\infty,\ -3\right)$  

•  $\left(\infty,-3\right]$  

•  $\left[-\infty,-3\right)$  

Choose the 2 answers that fill in the blanks:

When you __________ or _________ by a negative number, you flip the inequality sign.

• add

• subtract

• multiply

• divide

Tags

CCSS.6.EE.B.8

Find the graphed solution of:

 $\frac{x}{4}<-2\ or\ -3x\le-21$  

• 
• 
• 
• 

This was the correct answer for the previous question. Write this in interval notation.

• $\left(-8,7\right]$

• $\left(-\infty,-8\right)\cup\left[7,\infty\right]$

• $\left(-\infty,-8\right)\cup\left[7,\infty\right)$

• $\left(-\infty,-8\right)\cup\left(7,\infty\right)$

 $\left|x+3\right|=-2$  

Solve

•  $x=-5$  

• no solution

•  $x=-5\ and\ x=-1$  

•  $x=5\ and\ x=1$  

 $0\le x-2<3$  
Solve and describe the graph of the solution.

•  $2\le x<5$  The graph is open at 2 and closed at 5.

•  $2\le x<5$  The graph is closed at 2 and open at 5.

• no solution

•  $-2\le x<1$  The graph is closed at 2 and open at 1.

The correct inequality for the previous question was $2\le x<5$  

Write this in interval notation.

•  $\left[2,5\right]$  

•  $\left(2,\ 5\right)$  

•  $\left[2,\ 5\right)$  

•  $\left(2,\ 5\right]$  

 $x+5x-6<12$  
Solve

•  $x<1$  

•  $x<3$  

•  $x>1$  

•  $x>3$  

 $x<3$  was the correct inequality for the previous question.  Write this in interval notation.

•  $\left(-\infty,3\right]$  

•  $\left(3,\infty\right)$  

•  $\left(-\infty,3\right)$  

•  $\left[3,\infty\right)$  

Tags

CCSS.6.EE.B.8