Q: What is the inequality of 2 plus 3 less than or equal to 9?

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No. This is not an inequality, because you need something > something_else, or less than or 'not equal' or 'greater than or equal', etc. Since it has an x cubed term, it is not a quadratic.

"x3" is not an inequality. An inequality will have one of the following signs: less-than, less-than-or-equal, greater-than, greater-than-or-equal. for example: 3x - 5 < 15

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FALSE

It is a double inequality defining an interval. -1 ≤ n+2 ≤ 6 implies -3 ≤ n ≤ 4

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No. To be an inequality, it must somewhere have a greater than, less than, greater-or-equal, or less-or-equal sign.

No. This is not an inequality, because you need something > something_else, or less than or 'not equal' or 'greater than or equal', etc. Since it has an x cubed term, it is not a quadratic.

The line is dotted when the inequality is a strict inequality, ie it is either "less than" (<) or "greater than" (>). If there is an equality in the inequality, ie "less than or equal to" (≤), "greater than or equal to" (≥) or "equal to" (=) then the line is drawn as a solid line.

An inequality must have a greater than sign (>) OR a less than sign (<) OR a greater than or equal to sign (≥) OR a less than or equal to sign (≤).

It means that two expressions are not equal, as in a # b (Using "#" for inequality). A statement that includes "less than", "less than or equal", "greater than", or "greater than or equal", can also be considered an inequality, for example, | x | < 5

"x3" is not an inequality. An inequality will have one of the following signs: less-than, less-than-or-equal, greater-than, greater-than-or-equal. for example: 3x - 5 < 15

First of all, that's not an inequality. Inequalities have a a less than, equal to, greater than, greater than or equal to, or less then of equal to. But any way, the solution would be this: 3t + 5(-4) 3t+(-20) There you go, hope you liked it!

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'r' is equal to, or anywhere between, -13 and 38 .

This compound inequality cannot be solved.

x^4 is not an inequality. (An inequality has a "bigger than or equal to/less than or equal to/less than/bigger than" sign involved. I.e not an "equals" sign, since this would be an "equality"). But x^4 is not an equality, nor an inequality.