Tuesday

October 21, 2014

October 21, 2014

Posted by **marianne** on Sunday, June 1, 2008 at 9:43am.

- algebra -
**Damon**, Sunday, June 1, 2008 at 10:09am20 - (4/5)x ≥ 16 ??

-(4/5)x ≥ -4 now multiply both sides by -1 and change direction of arrow

(4/5) x ≤ 4

x ≤ 5

- algebra -
**drwls**, Sunday, June 1, 2008 at 10:11amI will first assume the second term is 4x/5 and not 4/(5x)

If 20 - 4x/5 >or= 16

-4x/5 >or= -4

-4x >or= 20

Now here is where you probably went wrong: When you multiply or divide both sides of an inequality by a negative number, you must change the direction of the > or < sign.

Divide by -4 and you get

x <or= 5

**Answer this Question**

**Related Questions**

Algebra--Correction? - Solve x^2 -3x is greater than or equal to 10 Would the ...

Math - Could someone please help me with this problem? I need to solve -5/2x ...

math - 9x+5greater than or equal to -40 or 7x+3greater than or equal to -11 ...

Algebra - Hi. I have an answer for this and just need to confirm it. 2x+5(less ...

Algebra - Did I do this correctly? 13 - (2c + 2) >(pretend it has the line ...

Statisics - Max 2A + 7B s.t. A + B greater than or equal to 12 2A + 2 B less ...

algebra - use the inequality -4t-8 is less than or equal to 12 a. t is greater ...

physics - A beam of electrons with momentum p=10^-23 kg m/s passed through a ...

Algebra - Use a graphing calculator or a computer to graph the system of ...

math - State the null hypothesis, Ho, and the alternative hypothesis, Ha, that ...