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andriy [413]
3 years ago
5

2

le" class="latex-formula">
​
Mathematics
2 answers:
babymother [125]3 years ago
7 0

Answer:

-6x

Step-by-step explanation:

2x - 8x = -6x

KATRIN_1 [288]3 years ago
7 0
Answer : -6x

Step-by-step explanation:

Question: 2x – 8x
Do, 2 – 8 which is -6
Then just put the x’s next to them
Answer : 2x – 8x = -6x
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A soup can has a height of 4 inches and a radius of 2.5 inches. What's the volume of soup in cubic inches that would fill one so
Alenkasestr [34]

Answer:

C. 78.5 in^3

Step-by-step explanation:

A soup can is in the shape of a cylinder. The volume of a cylinder can be found using the following formula:

v=\pi r^2h

We know that the height is 4 inches and the radius is 2.5 inches.

r= 2.5 in

h= 4 in

v=\pi (2.5in)^2*4in

Evaluate the exponent.

(2.5 in)^2=2.5 in*2.5in=6.25 in^2

v=\pi *6.25 in^2*4 in

Multiply 6.25 in^2 and 4 in.

6.25 in^2*4 in=25 in^3

v=\pi*25 in^3

Multiply pi and 25 in^3.

v=78.5398163 in^3

Round to the nearest tenth. The 3 in the hundredth place tells us to leave the 5 in the tenth place.

v=78.5 in^3

78.5 cubic inches can fill one soup can.

7 0
4 years ago
What is the r-value of the following data, to three decimal places
Mrrafil [7]
<h2>Answer:</h2>

Option: A is the correct answer.

              A.  -0.903

<h2>Step-by-step explanation:</h2>

The formula to calculate correlation coefficient r is given by:

r=\dfrac{n\sum xy-(\sum x)(\sum y)}{\sqrt{n(\sum x^2)-(\sum x)^2}\sqrt{n(\sum y^2)-(\sum y)^2}}

        x          y         xy          x²            y²        

        4         23        92        16           529

        5          12        60        25          144

        8          10        80        64          100

        9          9          81         81            81

        13         2          26       169           4

-------------------------------------------------------------------------

∑     39       56        339      355         858

Also n=5 ( as there are 5 data points )

Hence, we get:

r=\dfrac{5\times 339-39\times 56}{\sqrt{5\times 355-(39)^2}\times \sqrt{5\times 858-(56)^2}}\\\\\\r=\dfrac{-489}{\sqrt{254}\times \sqrt{1154}}\\

r=-\dfrac{489}{541.40188}=-0.9032

     Hence,  the r-value of the following data, to three decimal places is:

                               A.  -0.932

8 0
4 years ago
Choose the correct description of the graph of the compound inequality
Vikki [24]
A number line with a closed circle on-2, an open circle on 5, and shading in between so the answer C. is correct
5 0
3 years ago
Read 2 more answers
.Arrange in decreasing order 1/2, 2/3, 5/8, 3/4
Hatshy [7]

Answer:

5/8, 3/4, 2/3, 1/2

Step-by-step explanation:

8 is more than 4, 4 is more than 3, 3 is more than 2.

4 0
3 years ago
Read 2 more answers
Suppose \nabla f (x,y) = 3 y \sin(xy) \vec{i} + 3 x \sin(xy)\vec{j}, \vec{f} = \nabla f(x,y), and c is the segment of the parabo
Anna11 [10]

I'll assume you're supposed to compute the line integral of \nabla f over the given path C. By the fundamental theorem of calculus,

\displaystyle\int_C\nabla f(x,y)\cdot\mathrm d\vec r=f(4,48)-f(1,3)

so evaluating the integral is as simple as evaluting f at the endpoints of C. But first we need to determine f given its gradient.

We have

\dfrac{\partial f}{\partial x}=3y\sin(xy)\implies f(x,y)=-3\cos(xy)+g(y)

Differentiating with respect to y gives

\dfrac{\partial f}{\partial y}=3x\sin(xy)=3x\sin(xy)+\dfrac{\mathrm dg}{\mathrm dy}\implies\dfrac{\mathrm dg}{\mathrm dy}=0\implies g(y)=C

and we end up with

f(x,y)=-3\cos(xy)+C

for some constant C. Then the value of the line integral is -3\cos192+3\cos3.

8 0
4 years ago
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