Answer:
B. f(x) = 3/(x^2 +2x +1)
E. f(x) = 5/(3+x)
Step-by-step explanation:
The above functions have denominators that are zero at one point. For B, that point is x=-1; for E, that point is x=-3. When the denominator is zero, the function is undefined, so the corresponding x-value must be excluded from the domain.
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As written, choice D also qualifies. This is because the function written in the answer list here is ...
It will be undefined for x=0.
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<em>Comment on writing rational functions</em>
When the division symbol (/ or ÷) is used with a denominator that is a product or sum, that product or sum must be enclosed in parentheses. When the expression is typeset, the division bar acts as a grouping symbol. When the expression is written in text, a grouping symbol, such as parentheses, must be added.
Answer:
16
Step-by-step explanation:
So the number of tulips (t) plus the number of daffodils (d) should equal up to 20. So if we write that as an equation, it would t + d = 20. So now we have to find what two numbers could add up to 20, but let's not forget that the number of daffodils is equal to the square root of the number of tulips.
So now we have to find a number when added to its square root is 20. So going by process of elimination, you can eliminate 5 because the square root of that is a decimal and 5 plus a decimal isn't going to add up to 20. You know you can eliminate 20 because it already reaches the limit with the number of tulips, not allowing enough room for daffodils. You can eliminate 4 because the square root of that is 2, and 4 + 2 = 6, not 20.
So that leaves 16... The square root of 16 is 4, because 4 divided by itself twice equals 16. Now, let's add them and see if it equals 20. 16 tulips + 4 daffodils = 20. So 16 is your answer.
Sorry I am bad at explaining things, but I hope this helps anyway!
Answer : The expression which is equivalent to is .
Step-by-step explanation :
The given expression is:
As we know that:
So, by solving the above expression, we get:
By multiplying the power of 9, we get the following expression.
Hence, the expression which is equivalent to is .
Answer:
it's is letter d cuz 5-4 and 5-3 is 5-5
Answer:
The equations of both cups after t minutes is given by:
Step-by-step explanation:
The complete exercise says:
Two cups of coffee are poured from the same pot. The initial temperature of the coffee is 180°F, and is 0.2337 (for time in minutes).
Newton's law of cooling:
where,
= room temperature
= initial temperature
k=cooling constant
Hence,
<u>Cup 1:</u>
= 75 °F
= 180 °F
<u>Cup 2:</u>
= 75 °F
= 162 °F