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3 years ago

If 9: x = x:4, then x =

Mathematics

1 answer:

IceJOKER [234]3 years ago

4 0

Answer:

Step-by-step explanation:

9:x = x :4

Product of mean = product of extremes

x *x = 9*4

x² = 36

x² = 6²

x = 6

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The length of a rectangle is 1 units less than the width. The area of the rectangle is 20 units. What is the width, in units, of

Degger [83]

Answer:

Step-by-step explanation:

20 has many factors, including 4&5.

4 is one less than 5, so 4 is the length and 5 is our width.

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3 years ago

Evaluate C(44,21) use scientific notation, round to 3 decimal places as needed.

STALIN [3.7K]

$C(44,21)=\dfrac{44!}{21!23!}=\dfrac{24\cdot25\cdot\ldots\cdot43\cdot44}{2\cdot3\cdot\ldots\cdot 20\cdot21}=2,012,616,400,080\\
\approx2.013\cdot10^{12}$

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4 years ago

The volume of a cone is 36 pi inches cubed. What is the volume of a cylinder with the same base and height as the cone?

stiks02 [169]

Answer:

Step-by-step explanation:

4 0

3 years ago

What is the correct answer to this question please now

bezimeni [28]

Answer:

Rv and wx

Step-by-step explanation:

Skew means that its not parallel nor intersecting which means rv and wx are neither parallel nor intersecting

Hope this helps

8 0

3 years ago

Which equation represents a parabola that opens upward, has a minimum at x = 3, and has a line of symmetry at x = 3?

densk [106]

Answer:

$A.\ y = x^2 - 6x + 13$ is the correct answer.

Step-by-step explanation:

We know that vertex equation of a parabola is given as:

$y = a(x-h)^2+k$

where $(h,k)$ is the vertex of the parabola and

$(x,y)$ are the coordinate of points on parabola.

As per the question statement:

The parabola opens upwards that means coefficient of $x^{2}$ is positive.

Let $a = +1$

Minimum of parabola is at x = 3.

The vertex is at the minimum point of a parabola that opens upwards.

$\therefore$ $h = 3$

Putting value of a and h in the equation:

$y = 1(x-3)^2+k\\\Rightarrow y = (x-3)^2+k\\\Rightarrow y = x^2-6x+9+k$

Formula used: $(a-b)^2=a^{2} +b^{2} -2\times a \times b$

Comparing the equation formulated above with the options given we can observe that the equation formulated above is most similar to option A.

Comparing $y = x^2 - 6x + 13$ and $y = x^2-6x+9+k$

13 = 9+k

k = 4

Please refer to the graph attached.

Hence, correct option is $A.\ y = x^2 - 6x + 13$

3 0

3 years ago

Read 2 more answers