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brilliants [131]
3 years ago
12

How do you find the vertex & how do you know if a graph opens up or down help please asap

Mathematics
1 answer:
alex41 [277]3 years ago
8 0
Standard form of a quadratic f(x) = ax^2 + bx + c
In a quadratic function you find the vertex using the formula x = -b/2a; once you find the x value, substitute it into the equation and solve for y.
To know if a parabola opens up or down you look at the coefficient of the x^2 term. If it is positive, the graph opens up; if it is negative, the graph opens down.
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Can you guys help me please :(
Andrei [34K]

Answer:

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6 0
2 years ago
Solve this sum plsss urgent ​
stiks02 [169]

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2. absolute value is resembled using the formula : |x|

Here,

\hookrightarrow \sf |\dfrac{-3}{11} |

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final answer: 3/11

3.

\hookrightarrow \sf \dfrac{1}{2} \div \dfrac{3}{5}

\hookrightarrow \sf \dfrac{1}{2} * \dfrac{5}{3}

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4.

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4 0
2 years ago
Can someone help me out with number 2?
Norma-Jean [14]
\sin255^o=\sin(300^o-45^o)=\sin300^o\cos45^o-\cos300^o\sin45^o= \\\\=- \frac{ \sqrt{3} }{2}\cdot  \frac{ \sqrt{2} }{2}- \frac{1}{2} \cdot  \frac{ \sqrt{2} }{2}=-      \frac{ \sqrt{6} }{4} -  \frac{ \sqrt{2} }{4}=  -\frac{  \sqrt{6}+\sqrt{2} }{4}

5 0
3 years ago
Assume that you have a binomial experiment with p=0.4 and a sample size of 100. the expected value for this binomial distributio
UkoKoshka [18]
In Binomial distribution, the expected value or mean is given by,
E(X) = np 
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E(X) = 100×0.4 = 40 
7 0
3 years ago
Brianna invested $4,500 in an account paying an interest rate of 2.2% compounded continuously. Assuming no deposits or withdrawa
andrey2020 [161]
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4 0
3 years ago
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