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Hoochie [10]
3 years ago
10

Calculate the area of the circle with radius of 4.5 leave Answer in terms of pi

Mathematics
1 answer:
aleksklad [387]3 years ago
8 0
A=pi r^2
= 20.25 pi is the answer
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Step-by-step explanation:

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I am thinking of a number x. what algebraic expression represents 7 less than three times this number?
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Step-by-step explanation:

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How many solutions are there to the equation 10= a + b + c with each of a, b, and c a whole number greater than or equal to zero
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Which of the following are the coordinates of the vertex of y = −x2 + 2x + 1? (2, 1) (1, –2) (1, 2) (–2, 1)
IceJOKER [234]

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C

Step-by-step explanation:

We want to determine the vertex of the quadratic equation:

\displaystyle y = -x^2 + 2x + 1

Recall that the vertex is given by the formulas:

\displaystyle \text{Vertex} = \left(-\frac{b}{2a}, f\left(-\frac{b}{2a}\right)\right)

In this case, <em>a</em> = -1, <em>b</em> = 2, and <em>c</em> = 1.

Determine the <em>x-</em>coordinate of the vertex:

\displaystyle x = -\frac{(2)}{2(-1)} = 1

To determine the <em>y-</em>coordinate, evaluate the function at <em>x</em> = 1:

\displaystyle \begin{aligned} y(1)&= -(1)^2 + 2(1) + 1 \\ &= 2\end{aligned}

In conclusion, the vertex of the quadratic equation is (1, 2).

Hence, our answer is C.

3 0
3 years ago
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