Find the circumference and area of the circle. Use 3.14 for π. Round to the nearest hundredth if necessary. r = 2m

Answer:

x=2, y=-3

Step-by-step explanation:

This type of problems is called a system of equations, or simultaneous equations.

When solving simultaneous equations, you need to first make sure you have two unknown terms of the same number but different signs - this is so one unknown cancels out because we can only solve when there's one unknown. We already have this ('2y' and '-2y'). Now we just add the 'x's, the 'y's and the numbers:

2x+2y=-2

3x-2y=12

(2x+3x)+(2y-2y)=(-2+12)

5x=10

x=2

Now that we know the value of x, use it to find y:

2x+2y=-2

2(2)+2y=-2

4+2y=-2

2y=-6

y=-3

Picking 4 students out of 37 students would be a permutation.

This is written with the total students first, the letter P then the number of students getting picked:

The answer would be D. 37P4

Answer:

0.55 ; 0.32 ; 0.7

Step-by-step explanation:

Let :

Spanish = S ; French = F ; German = G

SnFnG = 3

(SnF) only = 9 - 3 = 6

(SnG) only = 5 - 3 = 2

(FnG) only = 5 - 3 = 2

S only = 28 - (6+3+2) = 17

F only = 21 - (2+3+2) = 14

G only = 12 - (6+3+2) = 1

Student not taking any of the classes :

(100 - (17+14+1+2+2+6+3))

100 - 45 = 55

A.) P(not taking any language class).

Required outcome = 55

Total possible outcomes = 100

= 55 / 100 = 0.55

B.)

P(taking exactly one language class)

(S only + F only + G only) / 100

(17 + 14 + 1) / 100

= 32/100

= 0.32

C.)

Atleast 1 is taking a language class out of 2 selected

Possibilities :

(taking and not taking) ;

(not taking and taking) ;

(taking and taking)

(45/100 * 55/99) + (55/100 * 45/99) + (45/100 * 44/99) = 0.7

Answer:

x = 25°

Step-by-step explanation:

3x + 30 + 2x + 3x + 30 + 4x = 360° (a full circle contains 360°)

12x + 60° = 360°

12x = 300°

x = 25°

Answer:

m<YVX = 49°

Step-by-step explanation:

Given:

m<YVZ = 52°

m<ZVW = 36°

m<XVU = 43°

m<YVX + m<YVZ + m<ZVW + m<XVU = 180° (angles in a straight line)

m<YVX + 52 + 36 + 43 = 180 (substitution)

m<YVX + 131 = 180

m<YVX = 180 - 131

m<YVX = 49°

Answer:

ii. [tex](a^{2} +b^{2} +2bc+c^{2} )(a+b+c)(a-b-c)[/tex]

v. [tex](x^{2} -y^{2} )^{2}[/tex]

Step-by-step explanation:

ii. [tex]a^{4} -(b+c)^{4}[/tex]

[tex]=(a^{2} )^{2} -((b+c)^{2} )^{2}[/tex] (Rewrite using Exponent Rules)

[tex]=(a^{2} +(b+c)^{2} )(a^{2} -(b+c)^{2} )[/tex] (Difference of Squares)

[tex]=(a^{2} +b^{2} +2bc+c^{2} )(a+(b+c))(a-(b+c))[/tex] (Expand the terms in the first parentheses, use the difference of squares again to further factor the terms in the second parentheses)

[tex]=(a^{2} +b^{2} +2bc+c^{2} )(a+b+c)(a-b-c)[/tex] (Simplify)

v. [tex]x^{4} -2x^{2} y^{2} +y^{4}[/tex]

[tex]=(x^{2})^{2} -2x^{2} y^{2} +(y^{2} )^{2}[/tex] (Rewrite using Exponent Rules, notice that this is now a perfect square trinomial)

[tex]=(x^{2} -y^{2} )^{2}[/tex] (Factor using perfect square trinomial formula)

Hope this helps!

Answer:

Whites don't deserve rights

Step-by-step explanation:

Answer:

b) Find P(X>0.6)

Explanation:

In order to find the product to the unknown variable you have to first solve the equation that has the parenthesis, The reason you should first find the parenthesis is because of  The Order Of Operations, You have to first do parenthesis to find the unknown variable.

Answer:

C is may answer

Step-by-step explanation:

I HOPE IS HELPS

2674 to the nearest hundred would be 2700

Answer:

0.887966

Step-by-step explanation:

1. Divide by 3500

(5000/3500)(2^x) = (3^x)

2. divide by 2^x and simplify

10/7 = (3/2)^x.

3. apply 'ln' function

ln(10/7) = xln(3/2)

4. divide ln(3/2)

ln(10/7) / ln(3/2) = x

x = 0.87966

Answer:

£b = £1.68

A = £44.68

Step-by-step explanation:

Given:

A = 5 + 1.9m + b

Where,

A = total cost

m = number of miles travelled

£b = charge for booking online

£5 = fixed charge

A. Harry

A = £29.48

m = 12 miles

£b = ?

A = 5 + 1.9m + b

29.48 = 5 + 1.9(12) + b

29.48 = 5 + 22.8 + b

29.48 = 27.8 + b

29.48 - 27.8 = b

b = 1.68

£b = £1.68

b) If Sue books online and travels 20 miles, what will be

A = 5 + 1.9m + b

= 5 + 1.9(20) + 1.68

= 5 + 38 + 1.68

= 44.68

A = £44.68

I am not answering all the questions.

I will only do the first one.

A = pir^2

A = pi(6)^2

A = 36pi

You do the rest.

Answer:

1.8

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

2.8 - 4 ÷ 4

Step 2: Evaluate

Answer:

1021.7

Step-by-step explanation:

lol i guess im sry if im wrong

if i right can i have brainliest?

Answer:1021.7

Step-by-step explanation:

Answer:

3x - 4y = -4

Step-by-step explanation:

When you put co-ordinate in it then give zero

3(-4)-4(-2)+3=0

3x-4y=-4   equations represent the line that is parallel to 3x - 4y = 7 and passes through the point (-4,-2).

The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is

m=y₂-y₁/x₂-x₁

The given equation is 3x - 4y = 7

Convert it to slope intercept form

-4y = 7 - 3x

4y=-7+3x

y=-7/4+3/4x

y=3/4x-7/4

3/4 is the slope and the parallel line should also have the same slope.

Now equation of line passing through (-4, -2)

-2=3/4(-4)+b

-2=-3+b

-1=b

So y=3/4x-1

3x-4y=-4 is another equation represents the line which is parallel.

Hence, 3x-4y=-4   equations represent the line that is parallel to 3x - 4y = 7 and passes through the point (-4,-2).

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Answer:

5%

Step-by-step explanation:

2/40 = 1/20

1/20 = 0.05

0.05 = 5%

Answer:

Equilateral acute

Step-by-step explanation:

Equilateral acute

Answer:MAFR: 3

Step-by-step explanation:

To get the perimeter, add the values in each shown.

Starting with the first one 3+5+4+6=18 m so it is the answer.

Answer:

b. 156

Step-by-step explanation:

180 - 29 = 151

x-5=151

x=151+5

Answer:

x = 156

Step-by-step explanation:

A straight line has an angle of 180 degrees. Subtract the known angle from 180:

180 - 29 = 151

The missing angle is 151 degrees. The value of x is 5 more, given 151 = ( x - 5 ).

151 + 5 = 156.

x = 156.

Hope that helped :)

Answer:

x = 2.2, y = 5.3

Step-by-step explanation:

This question is asking us to solve a system (find x and y). Because they give us that y = 1.5x + 2, then we can use this to substitute into the second equation.

9x + 4y = 41

9x + 4(1.5x + 2) = 41

Simplify.

9x + 6x + 8 = 41

15x + 8 = 41

Subtract 8 from both sides.

15x = 33

Divide both sides by 15.

x = 11/5 = 2.2

To find y, substitute x = 2.2

y = 1.5x + 2

y = 1.5 * 2.2 + 2

y = 3.3 + 2

y = 5.3

Now, we can double check to see if these two answers are right. Plug these numbers into the other equation (because to find y, we already used the first equation, so there is no need to check it, as it would just give us 5.3 = 5.3)

9x + 4y = 41

9 * 2.2 + 4 * 5.3 = 41

19.8 + 21.2 = 41

41 = 41

Thus, the answer is correct.

I hope this helps! Feel free to ask any questions!

Answer:

i. Average velocity = 11.11 m/s

ii. Displacement of the bus is 20000 m due east.

Step-by-step explanation:

The displacement of an object is the distance covered towards a definite direction, while the velocity of an object is the rate of its displacement in a given time.

average velocity = [tex]\frac{displacement}{time taken}[/tex]

But,

20 km = 20 000 m

30 minutes = 30 x 60

                   = 1800 s

So that,

average velocity  = [tex]\frac{20000}{1800}[/tex]

                             = 11.1111

average velocity = 11.1 m/s

The displacement of the bus is 20 km due east.

Answer:

the area of the front face would be 40 square inches.

Step-by-step explanation:

to find the are of a rectangle, you multiply the length times the width. we can see that the length is 8 inches at the bottom of the front face and we can see that width is 5 inches next to the left side face. if we take those two numbers (5 and 8) and multiply them, we get 40. all you have to do after that is add "square inches" to the end because when you find the area of something, it will be squared and the measurement used in inches.

Answer:

54

Step-by-step explanation:

2/3(7-16)^2

2/3(-9)^2

2/3*81

54

Answer:

C. A clothing store claims that 45% of its customers prefer skinny jeans over regular jeans. They concluded this from a survey which asked 120 randomly selected teenage customers which style they prefer.

E. A report by a company that manufactures hair brushes says 56% of people who buy their brushes own only one hair brush. The conclusion comes from a survey of 500 males who bought the company's brush.

Step-by-step explanation:

These two are the biased reports because they don't include the full population.

C is biased because it only includes teens, not people of any other age.

E is biased because it only included males, not females.

A isn't biased because it includes the stated population, high school students in the city.

B isn't biased because the sample was of 50 random customers, which is the general population.

D isn't biased as it included all data from the website.

Hope this helps!

The solution is,:

1) A clothing store claims that 45% of its customers prefer skinny jeans over regular jeans. They concluded this from a survey which asked 120 randomly selected teenage customers which style they prefer.

3) A report by a company that manufactures hair brushes says 56% of people who buy their brushes own only one hair brush. The conclusion comes from a survey of 500 males who bought the company's brush.

A portion of population taken and analyzed to predict information about population is called sample of that population.

Ex: When someone surveys a group, then he/she surveys a portion and not whole population in general.

Those numbers who summarize information about sample are called statistic.

(Statistic is different than statistics)

The  numbers which summarize information about the sample are called statistic.

The scenarios in which the statistics are misleading;

1) A clothing store claims that 45% of its customers prefer skinny jeans over regular jeans. They concluded this from a survey which asked 120 randomly selected teenage customers which style they prefer.

3) A report by a company that manufactures hair brushes says 56% of people who buy their brushes own only one hair brush. The conclusion comes from a survey of 500 males who bought the company's brush.

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