Brittney wants to simulate a random selection from a large population of 10% children and 90% teachers who play a musical instrument. Which TWO simulations are appropriate for this situation?

There is the positive association shown in the scatter plot and the television number 3 is cost-effective and rated highly by customers.

Scatter plot is the plot of graph in which the values of two variables plotted using their coordinates on the graph.

The average rate of change is the ratio of change in y values to the change in x values of the scatter plot.

The cost and customer rating of 13 televisions is shown on the scatter plot. The televisions are rated on a scale of 0 to 10.

Here, the price and rating is increasing together in the scatter plot. Thus, there is a positive association.

Here, the television number 3 has the high rate with low price. This affect the appropriateness of using a linear regression model to fit all the data.

The television number 3 which is rated at 10 but the cost of it has just $221. Thus, the television number 3 is cost-effective and rated highly by customers.

Thus, there is the positive association shown in the scatter plot and the television number 3 is cost-effective and rated highly by customers.

Learn more about the scatter plot here;

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Answer:

Answer above is correct

Step-by-step explanation:

Just be careful not to put it word for word especially with the values as to not get caught by the plagiarism system :D

Answer:

x=-1

Step-by-step explanation:

54x+64=49x+59

subtract 64

54x=49x-5

subtract 49x

5x=-5

divide by 5

x=-1

Your answer would be A because the radius of the circle is half of its diameter.

Hope this helps <3 :)

Answer:

0.205 ; 0.117 ; 0.999

Step-by-step explanation:

Using binomial probability distribution :

P(x =x) = nCx * p^x * (1 - p)^(n - x)

Probability of success, p = 0.5

P(x = 4) = 10C4 * 0.5^4 * 0.5^6

P(X = 4) = 0.205078125

B.) 3 heads and 7 tails

P(X = 7) = 10C7 * 0.5^7 * 0.5^3

P(X = 7) = 120 * 0.0009765625

P(X = 7) = 0.117

P(atleast one head)

P(x greater than equal to 1) = p(x =1) +... P(x = 10)

Using a binomial probability calculator :

P(x greater than equal to 1) = 0.999

Answer:

width = 9 cm

Step-by-step explanation:

the area of a 12cm square is 144

16w = 144

x = 9

Answer:

2 1/2

Step-by-step explanation:

The heaviest bag weighs 4 pounds, and the lightest bag weighs 1 1/2.

4 can be converted to 8/2 and 1 1/2 can be converted to 3/2.

8/2-3/2=5/2.

5/2 converts to 2 and 1/2 or 2.5

The heaviest bags weigh than one of the lightest bags by 2.5 pounds.

A number expressed as a quotient, in which a numerator is divided by a denominator.

The heaviest bag weighs 4 pounds,

and the lightest one weighs 3/2 pounds

The difference between the heaviest and lightest one is:

= 4-3/2

= 8/2-3/2

=5/2 pounds

= 2.5 pounds

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Step-by-step explanation:

1)Every whole number is a rational number.√

2)There are some fraction that are not rational number.√

3)every negative rational number lies to the right of zero on the number line.×

4) zero is not a rational number.×

5)every interger is a rational number.√

Answer:

He stills owes 9 dollars.

Step-by-step explanation:

-12+-15= -27. -27- 18= 9 .

Answer:

9

Step-by-step explanation:

V=pi (r squared) (h/3)

75pi = 25pi (h/3)

Divide both sides by 25 pi

3= h/3

Multiply both sides by 3

h=9

Answer:

A is correct

Step-by-step explanation:

A has no solution because since the slopes are the same, setting both equations equal to each other will cancel out the slopes and result in 8=16, meaning no solution will make both sides equal to each other.

B does have a solution because of different slopes

C does have a solution because of different slopes

D does have a solution because of different slopes

Answer:

29+11i

Step-by-step explanation:

(7−5i)(2+3i)

Expand

(7−5i)(2+3i)

using the FOIL Method.

7⋅2+7(3i)−5i⋅2−5i(3i)

Simplify and combine like terms.

Answer:

1. D= 46 degrees

2. X= 50 degrees

3. X= 180-118 = 62 degrees

4. X = 90-75 = 15 degrees.

Step-by-step explanation:

Answer:

Going by the order from the first row left to right and then second row left to right

1) D=46

2) x=62

3) x=50

4) x=15

5) b=40

Step-by-step explanation:

So for the first column for the first question its a complementary angle which means 2 or more angles added up to from a 90 degrees angle. We got 44 degrees already and an unknown angle which will lead to 90-44= 46 and that 46 degrees is your answer. D will be equal to 46.

For the second question on the first column, you have 2 angles forming a straight line. This is a s upplementary angle which means 2 or more angles added up to from 180 degrees. You have 1 angle already which is 118 and to find the other angle, 180-118 which will be 62. X will equal to 62

For the thrid question which is the first question on the SECOND column, you have another supplementary angle. You have 130 and 180-130=50 and X will equal to 50.

For the 4th question you have a complementary and one angle is 75. You do 90-75 and get 15. X will equal to 15.

The last question which is the huge rectangle on the right, you have 2 intersecting lines. We know one side is 40. Well the only thing that makes sense here is B=40 since its vertical to the one angle given. Vertical angles are equal so therfore the answer is b=40

Answer:

ABC= 60 XYZ=540

Step-by-step explanation:

The area of a triangle is 1/2*base*height so for ABC we need to find the height first. To do this we use pythag theorem, and create the equation 13^2=5^2+height^2 rearranging this we can figure out that sqrt(height)=13^2-5^2. For the base we do 2*5 since there are two congruent line segments both equal to 5. Using this we can do 1/2*12*10=area of ABC

For XYZ we can do 1/2*30*36=area of XYZ, we can do 2*15 since there are 2 congruent 15 length line segments at the base.

Answer:

x = 62°

Step-by-step explanation:

the top-most angle in the top isosceles triangle must be 73° also

the third angle of the top isosceles triangle is (180 - 73 + 73) which is 34°

the left portion of the right angle must be 56°

you can find by using this equation:  x + x + 56 = 180

2x = 124

x = 62

Answer:

5/9

Step-by-step explanation:

Let the denominator be k and thus numerator be 4 less than k or k - 4.

Fraction = (k - 4)/k

If 5 is added to both:

=> (k-4 + 5)/(k + 5) = 5/7

=> 7(k + 1) = 5(k + 5)

=> 7k + 7 = 5k + 25

=> 2k = 18

=> k = 9

Thus,

Fraction is (k-4)/k = (9-4)/9 = 5/9

Answer:

131.2

Step-by-step explanation:

x/55=31/14

x=31/13*55

x=131.153846154

Domain : 0 <=  x <= 4

Range : -2 <= y <= 2

Answer:

y= 2x + 4

Step-by-step explanation:

Answer:

[tex] x = - 3 \frac{4}{15}[/tex]

Step-by-step explanation:

[tex]2x - \frac{1}{3} + 3 = x - \frac{3}{5} [/tex]

[tex] = > 2x - \frac{ 1 +9 }{3} = x - \frac{3}{5} [/tex]

[tex] = > 2x + \frac{8}{3} = x - \frac{3}{5} [/tex]

[tex] = > 2x - x = - \frac{3}{5} - \frac{8}{3} [/tex]

[tex] = > x = - \frac{9 - 40}{15} [/tex]

[tex] = > x = - \frac{49}{15} [/tex]

[tex] = > x = - 3 \frac{4}{15} (ans)[/tex]

Answer:

x = - [tex]\frac{49}{15}[/tex]

Step-by-step explanation:

Given

2x - [tex]\frac{1}{3}[/tex] + 3 = x - [tex]\frac{3}{5}[/tex]

Multiply through by 15 ( the LCM of 3 and 5 ) to clear the fractions

30x - 5 + 45 = 15x - 9 , that is

30x + 40 = 15x - 9 ( subtract 15x from both sides )

15x + 40 = - 9 ( subtract 40 from both sides )

15x = - 49 ( divide both sides by 15 )

x = - [tex]\frac{49}{15}[/tex]

Answer:

-9x=12/-9

Step-by-step explanation:

-4(x+6)=5x+12

-4x-24=5x+12

-9x=12

x=12/-9

Answer:

x=-4

Step-by-step explanation:

-4(x+6)=5x+12

-4x-24=5x+12

-24-12=5x+4x

9x=-36

x=-36/9=-4

Answer:

The quadratic function is:  [tex](x-2)(x-12)=0[/tex]    and can be written as: [tex]x^2-14x+24=0[/tex]

Step-by-step explanation:

A quadratic function can typically be written in multiple forms, among which includes: (x-a)*(x-b)=0 where a, b can be any number

This quadratic function is solved for a and b, which represents the zeroes (or can be called roots) of the equation.

Given that the zeroes are already given, all that's need to write the quadratic function is to substitute a and b with the given zeroes:

Note: It doesn't matter which zeroes are substituted for a and b

                (x-a)*(x-b)=0

               (x-2)*(x-12)=0

Now, we can leave it in this form or expand the equation (often called the FOIL method):

               (x-2)*(x-12)=0                        Multiply each term with the other terms

               [tex]x^2-2x-12x+24=0[/tex]         Simplify by combining like terms

               [tex]x^2-14x+24=0[/tex]

Thus, the quadratic function for zeroes 12 and 2 is: [tex]x^2-14x+24=0[/tex]

Answer:aw ehtI Belive its 7 i could be wrong though

Step-by-step explanation:

the way you would solve this is u would arange the numbers like small to greatest then count how many there are and there happends to be 15 then you find the middle.

HOPE THIS HELPS

Answer:

37.68

Step-by-step explanation:

Circumference = Diameter x pi

Diameter = 12 feet

12 x 3.14 = 37.68

The circumference of the pool is 37.68 feet.

Answer 50% or .5 there are 2 things

Answer:

The student got 34 of the 40 questions correct.

Step-by-step explanation:

85% of 40 is 34.

Hope this helps! :)

I would appreciate brainliest, if not that's okay!

Answer:

47 correct answers

Step-by-step explanation:

Answer:

x=4

Step-by-step explanation:

4x-5+x=3+2x+4

5x-5=7+2x

5x-2x=7+5

3x=12

x=4

Answer:

The answer is B........m

Step-by-step explanation:

The area of circle with radius 4cm is,

area of circle = π r *r = 3.14 * 4 * 4

= approx 50.27

The area of circle with radius 2cm is,

area of circle = π * r * r = 3.14 * 2 * 2

= approx 12.57

The circles are concentric means they have a common Centre, so,

Area between the two circles = area of bigger circle - area of smaller circle

= 50.27 - 12.57

= 37. 7 sq. cm