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3 years ago

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Mathematics

1 answer:

Rainbow [258]3 years ago

6 0

It is D parabola because in a double right circular cone the vertex is in the middle of two opposite cones and cutting through the vertex is making parabola.

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20 ounces at $7 17 ounces at x dollars

tangare [24]

Make a proportion:
$\frac{20}{7} = \frac{17}{x}$
Then cross multiply and divide to solve.

20x=119

x=5.95

The answer is $5.95

6 0

3 years ago

The box plot show the weights in ounces of 15 different bags of almonds. About how many bags contained less than 27 ounces:

andre [41]

Answer:

See explanation

Step-by-step explanation:

The question is incomplete, as the box plot is not given. A general approach to the question, is as follows:

First, identify the 27 mark on the box plot.

Next, count the number of data less than 27.

Take, for instance, there are 6 dots or marks before 27;

This means that 6 bags contain less than 27 ounces

4 0

3 years ago

Please help me !!!

ad-work [718]

Answer:

x = 47

2x+6 = 100 which is the angle measure

Step-by-step explanation:

The angles are vertical and vertical angles are equal

2x+6 = 100

Subtract 6 from each side

2x+6-6 =100-6

2x = 94

Divide by 2

2x/2 = 94/2

x =47

Now to find the measure of 2x+6

We know that it is equal to 100

so 2x+6 = 100

6 0

3 years ago

When would half of one pizza be the same amount of pizza as half of another? When wouldn't it?

ra1l [238]

Answer:

It would when the pizza is the same size. It wouldn't if the sizes were different. Half of a kid pizza would not equal to half of a party pizza.

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Find the values of λ for which the determinant is zero.

elena55 [62]

Answer:

Determinant are special number that can only be defined for square matrices.

Step-by-step explanation:

Determinant are particularly important for analysis. The inverse of a matrix exist, if the determinant is not equal to zero.

How to find determinant

For a 2×2 matrix

$det ( \left[\begin{array}{cc}x&y\\a&z\end{array}\right] ) = xz-ay$

For a 3×3 matrix

we first decompose it to 2×2

$det (\left[\begin{array}{ccc}k&l&m\\o&p&q\\r&s&t\end{array}\right] )\\\\= k*det(\left[\begin{array}{cc}p&q\\s&t\end{array}\right] ) - l*det(\left[\begin{array}{cc}o&q\\r&t\end{array}\right] ) + m*det(\left[\begin{array}{cc}o&p\\r&s\end{array}\right] ) \\\\=k(pt-sq) - l(ot-rq) + m(os-rp)$

Example

Find the values of λ for which the determinant is zero

$\left[\begin{array}{ccc}s&-1&0\\-1&s&-1\\0&-1&1\end{array}\right]$

$det(\left[\begin{array}{ccc}s&-1&0\\-1&s&-1\\0&-1&1\end{array}\right])\\\\= s*det(\left[\begin{array}{cc}s&-1\\-1&1\end{array}\right] ) - (-1)*det(\left[\begin{array}{cc}-1&-1\\0&1\end{array}\right] ) + 0*det(\left[\begin{array}{cc}-1&s\\0&-1\end{array}\right] )\\\\= s(s(1)-(-1*-1)) - (-1)(-1*1 - (-1*0)) + 0\\= s(s - 1)) + 1(-1 + 0) \\=s^{2} -s-1$

Equating the determinant to zero

$s^{2} -s-1 =0\\$

s = $\frac{1}{2}$ * (1 ±5 )

s = 1.61 or -0.61

5 0

3 years ago