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3 years ago

Question 1 (5 points)

Mathematics

1 answer:

Maslowich3 years ago

3 0

Answer:

Question 1 (5 points)

Correlation implies causation.

False

Question 2 (5 points)

A correlation between two variables means...

that a change in one variable is matched by a change in the other variable

Question 3 (5 points)

A negative correlation between two variables means...

when one variable goes up, the other goes down

Question 4 (5 points)

A strong linear correlation means...

the graph of data points stay close to a line

Question 5 (5 points)

Standard deviation is a measure of...

the spread of data.

Question 6 (5 points)

The formula for standard deviation uses which average?

mean

Question 7 (5 points)

According the the fundamental counting principal for multiplication, if event A has m possible outcomes and event B has n possible, then even A followed by event B has....

m x n outcomes

Question 8 (5 points)

What is the value of 4! ("four factorial")

Question 9 (5 points)

If the probability of passing an exam is 80%, what is the probability of not passing it?

20%

Question 10 (5 points)

Given that when flipping a coin, there is 1/2 chance of getting a heads:

What is the probability of flipping a coin and getting heads twice in a row?

1/4

Step-by-step explanation:

These are just facts you should know.

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A bookstore is having a sale. Every book is $3 off,<br> regardless of the original price.

kolezko [41]

The correct answer is B

4 0

3 years ago

Read 2 more answers

How is multiplying mixed numbers different than multiplying fractions?

lara31 [8.8K]

The difference could be that it is more difficult than multiplying improper/regular fractions. Multiplying improper/regular fractions makes it much easier by just multiplying the numerator and denominator of the fractions while mixed fractions require more steps. After multiplying the fractions you just need to simplify.

7 0

3 years ago

Find EM.<br> Can anyone help me with this?

Komok [63]

The little red dashes on the segments means they are congruent. EM = MG

Let's plug the expressions from the picture into our equation above.

7x = 8x - 6

Subtract 8x from both sides.

-x = -6

Divide both sides by -1

x = 6

EM = 7x = 7(6) = 42

6 0

3 years ago

Okay so I have multiple questions that I need help with so I will put them below and you will get more points! Once you know the

lana66690 [7]

Vcylinder=hpir^2
Vcone=(1/3)hpir^2

d/2=r

so

1.
d=8
r=8/2=4
h=3r
h=3(4)
h=12
V=12*3.14*4^2
V=602.88 in^2

2. cone that fits has same base area and therefor same radius
d=6
r=6/2=3
rcone=3
find height of can
V=hpir^2
21=h*3.14*3^2
21=h*3.14*9
0.7431=h
so
cone height=0.7431
radius=3
V=(1/3)(0.7431)(3.14)(3^2)
V=7 cubic units

3.
same base
find dimentions
s=s=s
V=s^3
27=s^2
3=s
Vsquarepyramid=(1/3)hs^2
s=legnth of base
h=height
h=side
V=(1/3)(3)(3^2)
V=9
C

1. 602.88 in^2
2. 7 cubic units
3. 9cm^3, C

5 0

3 years ago

Give a third degree polynomial that has zeros of 13, 5i, and −5i, and has a value of −680 when x=3. Write the polynomial in stan

Vikki [24]

Answer:

$\dfrac{17x^3-221x^2+425x-5525}{9}\\$

Step-by-step explanation:

hello

we need to find something like, a being real

$a(x-13)(x-5i)(x+5i)$

with a so that

$a(3-13)(3-5i)(3+5i)=-680\\\\a(-10)(3^2-(5i)^2)= -10(9+25)a=-360a=-680\\ a = \dfrac{680}{360}=\dfrac{17*40}{9*40}=\dfrac{17}{9}$

so the third degree polynomial that we are looking for is

$\dfrac{17}{9}(x-13)(x-5i)(x+5i)\\=\dfrac{17}{9}(x-13)(x^2+25)\\\\=\dfrac{17}{9}(x^3+25x-13x^2-13*25)\\\\\\=\dfrac{17}{9}(x^3-13x^2+25x-325)\\\\\\\\=\dfrac{17}{9}x^3-\dfrac{17*13}{9}x^2+\dfrac{17*25}{9}x-\dfrac{17*325}{9}\\=\dfrac{17}{9}x^3-\dfrac{221}{9}x^2+\dfrac{425}{9}x-\dfrac{5525}{9}\\$

hope this helps

3 0

4 years ago