Mathematics College

Please help me
and show me step by step​

Please Help Meand Show Me Step By Step

Answers

Answer 1

Answer:

6. mean = 1.4

7. variance = 1.64

standard deviation = √1.64

Step-by-step explanation:

6.  

[tex]\textsf{mean }\mu=\[ \sum [x \cdot p(x)][/tex]

⇒ [tex]\mu[/tex] = 0 x 0.4 + 1 x 0.1 + 2 x 0.2 + 3 x 0.3 = 1.4

7. see attached for completed table

[tex]\textsf{variance }\sigma^2=\[ \sum [(x -\mu)^2 \cdot p(x)][/tex]

Therefore, variance is the total of the last column:

[tex]\sigma^2[/tex] = 0.784 + 0.016 + 0.072 + 0.768 = 1.64

standard deviation is the square root of variance:

[tex]\sigma=\sqrt{1.64}[/tex]

Please Help Meand Show Me Step By Step

Related Questions

10) Circle the two fractions that are equivalent in each set 1/4 3/12 2/6​

Answers

Answer:

1/4 and 3/12

Step-by-step explanation:

1/4=0.25

3/12=0.25

1/4 and 3/12 are the two fractions that are equivalent to each other. Hope this helps :)

Use the substitution method to find the slope and y-intercept.

Answers

Answer:

y=4x+7

Step-by-step explanation:

Answer:

slope: 4y-intercept: 7

Step-by-step explanation:

Substituting the given table values into the desired equation for a line will give two equations in two unknowns. These can be solved for the slope and y-intercept.

Equation we're substituting into:

  y = mx +b

  11 = m(1) +b . . . . . substitute (x, y) = (1, 11)

  15 = m(2) +b . . . . substitute (x, y) = (2, 15)

Subtracting the first equation from the second gives ...

  (15) -(11) = (2m +b) -(m +b)

  4 = m

Substituting this into the first equation gives ...

  11 = 4 +b

  7 = b . . . . . subtract 4

The slope is 4; the y-intercept is 7.

To increase an amount by 48% multiply by

Answers

0.48

Step-by-step explanation:

to increase an amount by 48%

you divide 48 with 100 to find the multiplier

which is 0.48

multiply 0.48 to an number to find 48%

Logan owns 2/3 of an acre of farmland. He grows beets on 1/3 of the land. How many acres of land does he grow beets?

Answers

Answer:

2/3 x1/3=2/9=0.22

Step-by-step explanation:

he own 2/3 and he grow 1/3 the total land grow beat 2/9


The large triangle is made of four rows
of small triangles. Some of the small
triangles have three corners that are on
the large triangle. Shade each of these
small triangles.

Answers

Answer:

you shade the bottom 4 triangles

Step-by-step explanation:

all of the small triangles on the bottom have a corner that include the larger triangle

Answer:

You should shade all 4 of the bottom triangles. Hope this helps!

3. Before tax, Louise spent a total of $38 on the items below at Starbucks
* 3 tall chocolate mochas for $3.70 each
* 2 grande caramel macchiatos for $4.45 each
* 4 venti Vanilla Bean Frappuccinos for $4.50 each
What percent of the $38 did Louise spent on Vanilla Bean Frappuccinos?
What is the answer

Answers

Answer:

  47.4%

Step-by-step explanation:

The total amount Louise spent on Frappuccinos was 4×$4.50 = $18. The fraction that is of the total is ...

  Fraps/Total = $18/$38 = 9/19

That can be converted to a percentage by multiplying by 100%:

  9/19 = (9/19)×100% ≈ 47.4%

Louise spent 47.4% of the $38 on Frappuccinos.

_____

Additional comment

The decimal equivalent of 9/19 is a repeating decimal with an 18-digit repeat.

You can write the answer in many ways, it depends what you have to round it to .
Everything is in the attachment below .
It can be written as :
47%
47.37%
47.4%
or in its original form
47.367%
Hope this helps !

the police use a speed gun during one hour 6 out of 25 cars went over the limit what percent of cars were over the speed limit

Answers

6/25 = 0.24

0.24 • 100 = 24%

6 = amount of cars that went over the limit
25 = total amount of cars

24% of the cars went over the speed limit.

What is the area of the trapezoid with height 10 units?

Answers

If by "long leg lengths" you mean the hypotenuse then the area is 116 sq. units.  If you mean the bases of the triangles then the area is 170 sq. units.

If the length of 12 is the hypotenuse, we first must find the base of the triangles using the Pythagorean theorem:

10² + b² = 12²

100 + b² = 144

b² = 44

b = √44 = 6.6

This means we have two triangles and a rectangle.  The area of the rectangle is 5(10) = 50 sq. units.  The area of each triangle is 1/2(6.6)(10) = 33.  Adding all 3 together we have:

50+33+33 = 116 sq. units.

If the 12 is the base, then we have the rectangle with the area of 5(10) = 50 and two triangles each with an area of 1/2(12)(10) = 60:

50+60+60 = 170 sq. units.

For each triangle, find the value of the variables

Answers

Answer:

Step-by-step explanation:

ΔEFG is an isosceles triangle. So, the angles opposite to equal side will be congruent.    {Isosceles triangle property}

x = 46°

ΔEHG , two angles are equal. So, it is an isosceles triangle.

Sides opposite to equal angles are congruent. {Converse isosceles triangle property}

y = GH

y = 8

help pleaseee and tyyy

Answers

Answer:

Step-by-step explanation:

Givens

d = 3.5

r = d / 2

r = 3.5/2

r = 1.75 in

h = 4 in

Formula

V = pi r^2 h

V = (1/3) *3.14 * 1.75^2 * 4

Solution

V = 12.66

How do we use negative numbers in real life?

Answers

When you have a debt in you bank account and owe money

When the temperature is below freezing

do this and I will give u points​

Answers

Answer:

7. A.Number of absentees in a class

8. A.Arithmetic mean

Step-by-step explanation:

Keep Safe all:)

parsnips were priced at 3 pounds for $1.23 what was the price per pound? how much would 10 pounds of parsnips cost?

Answers

Answer:

The answer is $4.10

Step-by-step explanation:

If 3 pounds = $1.23

1 pound =1.23/3

= 0.41

Therfore 10 pounds = 10× 0.41 = $4.10

Convert to a decimal. Be sure to mark repeating decimals

Answers

Answer:

00.35 prett simple this fraction

0.035

I don’t believe it’s repeating … to convert to a decimal you just divide 7 by 200 the line that divides the 2 numbers is essentially a division symbol.

How do you solve 2x-3y=-4 and x=7-3y by substitution?

Answers

Answer:

[tex](1, 2)[/tex]

Step-by-step explanation:

We can solve this system using substitution.

In this case, we can substitute 7-3y for x, as they are of equal value.

Therefore...

[tex]2x-3y=-4\\2(7-3y)-3y=-4\\14-6y-3y=-4\\14-9y=-4[/tex]

Subtract 14 from both sides:

[tex]-9y=-18[/tex]

Divide both sides by -9

[tex]y=2[/tex]

Now, substitute 2 for y to solve for x:

[tex]x=7-3y=7-3(2)=7-6=1[/tex]

Therefore the solution to this system of equations is:

[tex](x, y)=(1, 2)[/tex]

Benjamin left his house and drove to the store. He stopped and went inside. From there, he drove in the same direction until he got to the bank. He stopped and went inside the bank. Then he drove home. The graph below shows the number of blocks away from home Benjamin is xx minutes after he left his house, until he got back home.

Answers

Answer:

whats the question??

Step-by-step explanation:

the box plot below represents some data set. What is the value of the median​

Answers

Answer:

41

Step-by-step explanation:

the median is the line that's in the middle of the box

Answer:

50

Step-by-step explanation:

It would be 50 since it is in the middle

a square has a perimeter of 60 ft what is the area

Answers

Answer:

3600

Step-by-step explanation:

60×60=3600= 60^2 one side is 60 and another is 60 all sides are 60

Answer:

225 ft squared

Step-by-step explanation:

Perimeter=60 ft

Length of one side= 60/4 =15 ft

area= (15x15) = 225 ft squared

Solve:

Picture Below

Answers

Answer: 8/3 or 2 2/3

In the pattern what is the ratio of black squares to gray squares?

Answers

1:2

Looking at the image, there are 2 grey squares and 1 black square. Since the question is asking how many black squares to grey squares, it would be a 1:2.

Write y=3/5x+7 in standard form

Answers

I think the answer is 3x−5y=−35

Answer:

3x-5y=-35

Step-by-step explanation:

I have no clue what the step by step explanation i looked it up

what is this i'm very confused

Answers

Answer:

That's the symbol for pi

Step-by-step explanation:

Answer:

10pi = 31.41592653 . . . .

Step-by-step explanation:

10 times pi is shifting everything 1 decimal place to the left

pi is about 3.141592 . . . .


help pls i dont get this and it needs to be done before we leave

Answers

Answer: 2210.6

Step-by-step explanation:

[tex]V=\pi (8)^{2} \cdot 11 \approx 3.14 \cdot 8^{2} \cdot 11 \approx 2210.6[/tex]

In a zoo deers and lions are in ratio 5/2.If there are 20 deers how many lions are there?​

Answers

Answer:

There should be 8 lions

Step-by-step explanation:

If the deer lion ratio is 5 to 2 then just divide 20 by 5, which leaves you with 4, and times it by 2 giving you 8

Work out the lengths of sides a and b. Give your answers to 1 decimals place. (Pythagoras theoram

Answers

Step-by-step explanation:

h²=o²+a²

a²=8²+5²

a²=64+25

a²=89

a=√89

a=9.433

To one decimal place it is 9.4

for b,

h²=o²+a²

17²=b²+12²

289=b²+144

289-144=b²

145=b²

b=√145

b=12.041

To one decimal place it is 12.0

PLS HELP ME, PLS THIS IS DUE FIRST CORRECT ANSWER GETS BRAINLIEST​

Answers

Answer:

b

Step-by-step explanation:

B. −9.1(−4+12)

They distribute to make − 9.1 (− 4) − 9.1 (12)

Distribution is to multiply one value each from the value outside the parentheses (from the left side)

I would say C.

When you distribute, you take the plus/minus along with the constant behind it, which in this case would give you negative 12 in answer C.

And distributing is multiplying each value in parentheses by the one outside, so it would be 9.1(-4) and 9.1(-12)

Pythagorean theory formula and thank you :)

Answers

Answer:

B.

Step-by-step explanation:

4² + 12² = c²

16 + 144 = c²

160 = c²

√160

:)

Answer:

[tex]c=\sqrt{160}[/tex]

Step-by-step explanation:

Pythagorean theory formula:-

[tex]a^2+b^2=c^2[/tex]

Where..

a= 4, b= 12, c= x

[tex]4^2+12^2=x^2[/tex]

[tex]16+144=x^2[/tex]

[tex]160=x^2[/tex]

[tex]\sqrt{160}=\sqrt{x^2}[/tex]

[tex]x=\sqrt{160}[/tex]

How do you simplify 35/100

Answers

Answer:

35/100

Step-by-step explanation:

it would be 7/20 because both the numerator and denominator are divisible by the number 5.

To simplify 35/100, divide the numerator and the denominator but a common factor. In this situation the common factor is 5. 35/5=7 and 100/5=20
The answer is 7/20

An 760g boulder has a density of 8 g/cm^3 What is the volume of the boulder?

Answers

Answer:

95 g/cm^3

Step-by-step explanation:

We have : Volume = mass / density
Replace the numbers :
V = 760 / 8 = 95 g/cm^3

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
Match each linear model to its inverse.
y =
y = 1 + 2
y = - - 2
y =
-- +2
y =
y =
Linear Model
Inverse
4r + 3y = 6
31 - 4y = 6
4x – 3y = -6
3x + 4y = -6

Answers

Answer:

[tex]y = \frac{ - 3}{4} x + \frac{3}{2} \\ y = \frac{4}{3} x + 2 \\ y = \frac{3}{4} x - \frac{3}{2} \\ y = \frac{ - 4}{3} x - 2[/tex]

Step-by-step explanation:

Please see the attachment.

Other Questions
Cybernaut Industries is buying back bonds which have an annual coupon payment of $300. The coupon was paid just 92 days earlier. How much accrued interest from the coupon payment will Cybernaut have to pay on each bond? At night, an equilibrium reaction between two different nitrogen compounds generates N2O5N2O5 in the atmosphere, as represented below.Reaction 1: NO3(g)+NO2(g)N2O5(g)K=2.61011NO3(g)+NO2(g)N2O5(g)K=2.61011During the day, solar radiation is absorbed by NO3(g), resulting in its decomposition. Which of the following best explains whether the equilibrium concentration of N2O5(g) in the atmosphere in the daytime is different from that in the nighttime, and why?a) [N2O5] will be higher during the day, because the decomposition of NO3(g) results in an increase in the rate of production of N2O5(g).b) [N2O5] will be higher during the day, because NO2(g) will be in excess, leading to an increase in the rate of production of N2O5(g)c) [N2O5] will be higher at night, because the decomposition of NO3(g) in the daytime will result in an increase in the rate of consumption of N2O5(g) to reform NO3(g)d) [N2O5] will be about the same at nighttime and daytime, because the amount of NO2(g) will not be changed and the equilibrium will not be affected. aydenme x favor es para para maana el curso es de Razonamiento Verbal Que es el espaol culto en america Ms. Pitt set up a classroom demonstration to show what happens when a sample of zinc metal is add a.ed to a flask containing hydrochloric acid (HCl). The diagram shows what the students in the classroom observed during the demonstration. The students made two other observations: The flask felt warmer after adding the sample. The sample became smaller over time. Which of the following is NOT an evidence of a chemical reaction in this example. A. Gas collected in the balloon B.Temperature of sample is increased c.Volume of HCl remains the same D.Size of the zinc has become smaller Mr. Baker works with the other members of his department to ensure horizontal alignment of the curriculum. This means the departmental team is focused primarily on: The original price of a computer game is 45$ The price is marked down by 18$ what percent of the original price is the markdown? If represented in a stem-and-leaf plot, what would be the stem of the number 1457?1714145 Next, write your introduction. Your introduction should include your thesis statement as well as a brief review of your topic. Your introduction should also tell your reader why they should care about this topic. Remember that your introduction should grab the readers interest and make him or her want to keep reading. THIS IS ABOUT EARLY CHRISTANITY ________ is the term for cold-blooded animals that can not control their body temperature. They use the environment to stay warm and cool. Ectotherm Endotherm Homoeothermic None of the above. If the area of squareA is 225 f12 and thearea of square B is 400ft2, what is the area ofsquare C? N Solve for x. Solve for x Which boxes have a volume of 120 cubic feet? (4 points)Box A: length of 5 ft, width of 4 ft, height of 6 ftBox B: length of 7 ft, width of 7 ft, height of 6 ftBox C: length of 3 ft, width of 6 ft, height of 4 ftBox D: length of 10 ft, width of 3 ft, height of 4 ft, A, D, B, D Melissa got two puppies, Ben and Sadie. When she got them, Sadie was 5 pouds less than Ben. If Sadie's weight quadrupled after one year, write an expression using parentheses to show Sadie's weight. Sodium, Mercury, Argon, and Neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of Neon and Argon than there are for Mercury and Sodium. Which of the following best describes the elements within the group of the periodic table that contains Neon and Argon gas?A) Solid at room temperature and mostly unreactive with strong acids.B) Gaseous at room temperature and mostly unreactive with metals.C) Solid at room temperature and mildly reactive with strong acidsD) Gaseous at room temperature and highly reactive with metals. During a slide show, Luis wants a picture to appear on one of his slides after the slide appears on the screen. Which type of animation should he use IiisjsjsjajJAANA SOLVE PLRASE Keshawn thinks that the graph of a function f(x) and its inverse f -1 (x) will always intersect. Give a counterexample to disprove his statement Determine the area of the archway with a semicircle top arch and two rectangular pillars. The lower supports are and the area of the two supports is square meters. The upper arch can be decomposed as one semicircle with radius meters minus a semicircle with radius 3 meters. The area of the archway is ( 24) square meters. help again :) :) will give brainlist :)