2 years ago

Which of the following can be used to show a cause-and-effect relationship between two variables?

Mathematics

2 answers:

disa [49]2 years ago

6 0

Answer:

a sample survey

jok3333 [9.3K]2 years ago

3 0

Answer:

A controlled experiment.

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GarryVolchara [31]

Answer:

-30=-30

Step-by-step explanation:

Always true.

8 0

3 years ago

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Find the area between y=(x-2)ex and the x-axis from x=2 to x=4.

mojhsa [17]

Answer:

$e^4+e^2$

Step-by-step explanation:

It can be found by integral.

First let's find the intersection points.

$(x-2)e^x = 0$

Only intersection point is x = 2.

And it is asked to find the area in the interval (2, 4).

$\int\limits^4_2 (x-2)e^x \,dx=?$

We will use integration by parts.

$x-2=u\\dx=du\\e^xdx=dv\\e^x=v$

$\int\limits^4_2 (x-2)e^x \,dx=uv-\int vdu=(x-2)e^x-\int e^xdx=(x-2)e^x-e^x=\\\\=(x-3)e^x|^4_2=(4-3)e^4-(2-3)e^2=e^4+e^2$

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3 years ago

What is the sum of 2x^2-5x-2and 4x^2-6x+8

rjkz [21]

Step-by-step explanation:

this should be correct but im not 100%sure

6 0

2 years ago

A spinner has 8 sections. 2 are grey 6 are blue. The spinner is spun twice what is the probability that the first lands on grey

sweet [91]

Answe

Step-by-step explanation:

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3 years ago

Write an equation for a linear function whose graph has the given characteristics.

Sophie [7]

Answer:

y-1=1/4(x-8)

x-4y-4=0

7 0

3 years ago