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anonymous
 one year ago
I got this question wrong on my College Algebra test and i don't know why it is wrong. please help.
anonymous
 one year ago
I got this question wrong on my College Algebra test and i don't know why it is wrong. please help.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Write in interval notation... \[7 \le x < 9\] and i put \[[7, \infty) (\infty, 9)\] How is this wrong?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@hartnn can you help explain this please

kropot72
 one year ago
Best ResponseYou've already chosen the best response.1Put into words, the expression says: x is equal to or greater than negative 7, and x is less than 9.

jackthegreatest
 one year ago
Best ResponseYou've already chosen the best response.1first of all, x does not go on to infinite

jackthegreatest
 one year ago
Best ResponseYou've already chosen the best response.1i just had this lesson in math

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2which also means x is between 7 and 9 (7 included) what you answered meant: x is greater than 7 till infinity, and x is less than 9 till infinity

kropot72
 one year ago
Best ResponseYou've already chosen the best response.1You can find how to express this here: http://www.mathwords.com/i/interval_notation.htm

jackthegreatest
 one year ago
Best ResponseYou've already chosen the best response.1the answer should be [7,9) i am almost certain

jackthegreatest
 one year ago
Best ResponseYou've already chosen the best response.1@hartnn is right

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't need graphs.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.2ok, what doubt you still have? :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0interval notation is like a basket, lets say of a row of kittens: kitten a, b, c, d, e. [b, d] means basket contains b and d: {b, c, d} (a, e) means the basket does not include a and e: a {b, c, d} e what you wrote was two baskets. one that contains {7 and everything above in the world} and one that contains {everything below in the world up to but not including 9} 9 is out here. You need an additional relationship between the two to say what if you mean "AND" or "OR".. (another way of saying it is, only the overlap of the two baskets, known as INTERSECTION of the two... or anything in both baskets, you dont care, known as the UNION of the two.) Since you didn't indicate a relation, you pretty much said two baskets that contain everything in the world. :) the correct basket is [7, 9).. only the stuff in between 7 and 9, INCLUDING 7 but NOT including 9. Technically the same meaning but you haven't learned it yet, is the INTERSECTION of the two baskets you wrote: The basket containing only the overlap or what's in both baskets. Which simplifies to [7, 9)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0sorry UNION is anything in in EITHER basket is more correct wording. :)
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