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Ilya [14]
3 years ago
13

Whats the answer to -x² +6x + 18 = 0

Mathematics
2 answers:
Aneli [31]3 years ago
5 0

Answer:

8.2

Step-by-step explanation:

emmainna [20.7K]3 years ago
3 0

Answer:

Step-by-step explanation:

Step-1 : Multiply the coefficient of the first term by the constant   1 • -6 = -6  

Step-2 : Find two factors of  -6  whose sum equals the coefficient of the middle term, which is   2 .

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Negate: "In every good book there is a plot twist or surprise ending."
uysha [10]

Answer:

"There exists a good book that does not have a plot twist and does not have a surprise ending".

Step-by-step explanation:

We negate the universal quantifier "for all" or equivalently "In every" using the existential quantifier "There exists". So, we negate "In every good book" as "There exists a good book". In the other hand, we have the propositions

P: there is a plot twist

Q: there is a surprise ending,

and the conjunction

P ∨ Q. We negate this conjunction using the De Morgan's Laws as

¬(P∨Q) = ¬P∧¬Q

i.e., does not have a plot twist and does not have a surprise ending. Therefore, we negate "In every good book there is a plot twist or surprise ending" as "There exists a good book that does not have a plot twist and does not have a surprise ending".

7 0
3 years ago
Y=f(x)=3x<br><br> value of f(1/2)
elena-14-01-66 [18.8K]
You just need to substitute x with 1/2

Your answer will then be 3(1/2) which is 3/2 or 1.5
7 0
3 years ago
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Miki bought some erasers at the school store for $0.39. After
lord [1]
She either had $0.52 or more because it doesn’t say how many erasers she got
8 0
3 years ago
How many star are there universe​
rjkz [21]

Answer:

there is no number for that,there is infinite stars in the universe

3 0
4 years ago
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Find f'(x) if f(x) = (2/(x^1/3)) + 3 cos x + x^pi
galben [10]

The derivative of f is

f'(x)=\left(2x^{-1/3}+3\cos x+x^\pi\right)'

f'(x)=\left(2x^{-1/3}\right)'+(3\cos x)'+\left(x^\pi\right)'

By the power rule,

f'(x)=-\dfrac23x^{-4/3}+(3\cos x)'+\pi x^{\pi-1}

The derivative of \cos x is -\sin x:

f'(x)=-\dfrac23x^{-4/3}-3\sin x+\pi x^{\pi-1}

3 0
3 years ago
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