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When you multiply both sides of any inequality by a negative number you need to do what to the inequality symbol?
Wiki User
∙ 14y ago
You need to change it to the opposite direction; e.g 5 > 1; multiply both sides by -2 it becomes -10 < -2
Wiki User
∙ 14y ago
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What happens to the inequality symbol when you subtract a negative number?
The inequality symbol doesn't change direction in this case.Note that that is the same as adding a positive number.Note also that if you MULTIPLY or DIVIDE by a negative number, then you need to change the direction of the inequality symbol.
When do you change the direction of an inequality symbol?
When a side is multiplied or divided by a negative number.
When graphing a linear inequality the first step is to replace the inequality symbol with what sign?
With the equal sign (=).
What is A mathematical sentence which contains an inequality symbol and one variable raised to the first power is called a?
It is a linear inequality.
How do you solve and inequality with two signs?
Split it into two parts, solve each part as if it had an "=" sign instead of an inequality. Ex: -6<3x+2<12 -6<3x+2; -8<3x; -8/3<x Other side-- 3x+2<12; 3x<10; x<10/3 Then put them back together. -8/3<x<10/3 *Make sure you remember to switch the direction of the inequality symbol if you are dividing by a negative number.*
If you multiply an inequality by a negative number when should you reverse the inequality symbol?
Always.
What happens to the inequality symbol when you subtract a negative number?
The inequality symbol doesn't change direction in this case.Note that that is the same as adding a positive number.Note also that if you MULTIPLY or DIVIDE by a negative number, then you need to change the direction of the inequality symbol.
When you multiply both sides of any inequality by a negative number you need to the inequality symbol?
When an Inequality expression is multiplied (or divided) by a negative number then the Inequality sign is reversed. Example : -9x < 18 : -x < 2 : x > -2........as both sides have been multiplied by -1.
Does positive number become negative when it crosses the inequality symbol?
Yes.
When you divide both sides of any inequality by a negative number you need to what the inequality symbol?
Flip it around
When do you change the direction of an inequality symbol?
When a side is multiplied or divided by a negative number.
How do you know when to reverse the direction of an inequality symbol?
u only reverse the sign when u multiply or divide by a NEGATIVE number...otherwise u don't change the direction
When solving an inequality when is it necessary to change the direction of the inequality symbol?
When the two sides of the inequality are multiplied or divided by a negative number or term or expression.
Why must you flip the inequality symbol when you divide by a negative number?
For the same reason you must flip it when you multiply by a negative number. An example should suffice. 2 < 3 If you multiply by -1, without switching the sign, you get: -2 < -3, which is wrong. Actually, -2 > -3. Look at a number line if you are not sure about this - numbers to the left are less than numbers further to the right. Dividing by a negative number is the same as multiplying by the reciprocal, which in this case is also negative. These signs are strictly the "Greater than" and "Less than" signs. The inequality sign is an = with a / stroke through it. If you divide an inequality by -1 it remains an inequality.
When do you reverse the inequality symbol in a two-step inequality?
When multiplying or dividing a negative number or variable.
Why the inequality symbol must be reversed when both sides of an inequality are multiplied or divided by a negative number?
The inequality symbol shows wich side of the equation is greater than the other. When you multiply a positive number by a negative number you get a negative result ( for instance 4 x -2 = -8 ). 4 is larger than -8. If we multiply a negative number by a negative number we get a positive number. 1) -5 > -6 . -1 (-5) < -1(-6) . 5 < 6 this is a true statement 2) 5 > -6 . -1 (5) < -1 (-6) . -5 < 6 this is also true 3) 6 > 5 . -1 (6) < -1 (5) . -6 < - 5 this one works too
Why it is necessary to reverse the inequality symbol when multiplying both sides of an inequality by a negative number Provide an example to support your explanation?
"<" means "farther to the left on the number line " and ">" means "farther to the right on the number line". Multiplying by a negative number switches the sign, which is a reflection that turns left into right. Double switch example: 1<2 multiply this by (-2): -2>-4 multiply this by (-1): 2<4
