Question:

Algebra help please answer fast?

by Guest58728  |  earlier

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when solving an inequality, i know that when you divide or multiply a a negative number u reverse the sign (<, >)

but when solving something like this, how does it work?

-4<6x-10<14 the second < is supposed to have a underscore thing on the bottom, so can someone help me solve this. and also explain how the reverse works in these type of inequalitys?

thanks in advance.

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9 ANSWERS


  1. -4 &lt; 6x - 10 ≤ 14

    -4 + 10 &lt; 6x ≤ 14 + 10

    6 &lt; 6x ≤ 24

    6/6 &lt; x ≤ 24/6

    1 &lt; x ≤ 4


  2. you&#039;re not dividing by a neg number, so the signs would remain the same.  you want x alone in the middle so, whatever you do to one side of the inequality, you have to do to the other sides.

    -4&lt;6x-10&lt;=14  add 10

    6&lt;6x&lt;=24 divide by 6

    1&lt;x&lt;=4  all done!

  3. -4&lt;6x-10&lt;14

    6&lt;6x&lt;24

    1&lt;x&lt;4

    x is greater than one and less than or equal to 4

  4. in a compound inequality (like this one), the rule is still the same:

    if you multiply or divide by a negative number, you reverse the direction of BOTH inequality symbols

    for this particular inequality, you don&#039;t have to, but there are some where you do...

  5. -4 &lt; 6x-10 &lt;_ 14

    Add 10 to all 3 parts:

    6 &lt; 6x &lt;_ 24

    Divide by 6 at all 3 parts:

    1 &lt; x &lt;_ 4

    In the above case, we don&#039;t have to multiply or divide by a negative number. If we do, it works the same way as you&#039;ve described, just that we reverse all the inequality signs.

    e.g. If we have...

    6 &lt; -6x &lt; 24

    Divide by -6 at all 3 parts.

    -1 &gt; x &gt; -4

    Since we don&#039;t usually do the signs like that, let&#039;s make it into a nicer format:

    -4 &lt; x &lt; -1

  6. -4&lt;6x-10&lt;14

    -4+10&lt;6x-10+10&lt;10+14

    6&lt;6x&lt;24

    1&lt;x&lt;4

  7. It can be read as

    - 4 is less than 6x - 10 which is LESS THAN OR EQUAL TO (the underscore thing) 14.

    Hope this answers your question.

  8. -4 &lt; 6x -10 &lt;=14 here our aim is to find the value for that is the range  where the values of x lies . so we follow the steps.

    -4+10&lt;6x-10+10&lt;=14+10

    +6 &lt; 6X &lt;= 24 Since  6 is the factor divide by 6

    1&lt; x  &lt; = 4  says thatx takes the values from 1 to 4

    (ie) x={1,2,3,4}  

  9. -4 &lt; 6x - 10 &lt;= 14

    If you break this expression, it will be

    - 4 &lt; 6x - 10  and 6x - 10 &lt;= 14

    -4 + 10 &lt; 6x - 10 + 10

    6 &lt;  6x

    1 &lt; x

    ======

    6x - 10 &lt;= 14

    6x - 10 + 10 &lt;= 14 + 10

    6x &lt;= 24

    x &lt;=4

    Your answer will be

    1 &lt; x &lt;= 4

    ========

    But you can also solve the expression simultaneously.

    -4 &lt; 6x - 10 &lt;= 14

    -4 + 10 &lt; 6x - 10 + 10 &lt;= 14 + 10

    6 &lt; 6x &lt;= 24

    1 &lt; x &lt;= 4

    Don&#039;y worry about the inequality sign, treat them as = sign

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