two
3x<18
11
In a set, as it is usually defined, elements can't be repeated. "Mathematics" has 8 distinct letters, so your set would have 8 letters. The number of possible subsets (this includes the empty set, and the set itself) is two to the power 8.
Using the quadratic formula, I found the solution set is x=2,x=-9
You never square a whole equation. That's just silly.
1/9 would be 2, so 7/9 would be 14.7/9 of 18 = 14 counters.
14
To find out how many counters 79 represents from a set of 18, you can set up a proportion. Since 79 is more than the total of 18, it suggests you might be looking for a percentage or a fraction of the whole set. If you meant to find what fraction of 18 corresponds to 79, that would be 79/18, which simplifies to approximately 4.39 times the whole set. If you need a different interpretation, please clarify!
it would be with 1/9 to reduce and your final answer would be 14
To convert a mixed number to an improper fraction, multiply the whole number by the denominator and add the numerator, then write this sum over the original denominator. Conversely, to convert an improper fraction to a mixed number, divide the numerator by the denominator to get the whole number, and write any remainder as the numerator of the fractional part, keeping the original denominator.
18 because 18/2 = 9
{12, 14, 16, 18} is.
18
There are 18.
There are 18.
The lowest common denominator of any set of whole numbers is 1
Exactly 18 whole times with nothing left over.