Translate the phrase "nine more than two times a number" into an algebraic expression. what is the answer to this
1 answer:
Answer:
<em>The algebraic expression will be: , where
is the number.</em>
Step-by-step explanation:
Suppose, the number is
Now, "two times the number" means 2 is multiplied with the number. As the number is , so "two times the number" will be:
Then "9 more than" means 9 is added. So, "9 more than 2x" will be:
Thus, the algebraic expression will be:
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Answer:
x = - 2, x = 9
Step-by-step explanation:
Given
f(x) =
The denominator of f(x) cannot be zero as this would make f(x) undefined.
Equating the denominator to zero and solving gives the values that x cannot be.
x² - 7x - 18 = 0
(x - 9)(x + 2) = 0
Equate each factor to zero and solve for x
x + 2 = 0 ⇒ x = - 2
x - 9 = 0 ⇒ x = 9
The excluded values are x = - 2, x = 9