x + y = 7
2x - 3y = -21

The mean absolute deviation of Polina's math scores is 8.8.

The answer is D) 8.8.

What is the mean absolute deviation?

The mean absolute deviation (MAD) is a measure of variability that quantifies the average difference between the observations in a dataset and the dataset's mean. It is calculated by finding the average of the absolute deviations of the data points from their mean.

To find the mean absolute deviation (MAD) of Polina's math scores, we first need to find the mean of the scores:

Mean = (72 + 65 + 75 + 88 + 90)/5

Mean = 78

Next, we find the absolute deviation of each score by finding the difference between each score and the mean, taking the absolute value of the difference, and then adding up the absolute differences:

|72 - 78| = 6

|65 - 78| = 13

|75 - 78| = 3

|88 - 78| = 10

|90 - 78| = 12

Sum of absolute deviations = 6 + 13 + 3 + 10 + 12

Sum of absolute deviations = 44

Finally, we find the MAD by dividing the sum of the absolute deviations by the number of scores:

MAD = 44/5

MAD = 8.8

Therefore, the mean absolute deviation of Polina's math scores is 8.8.

The answer is D) 8.8.

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Answer:

d ( 8.8)

Step-by-step explanation:

/edge 2023/ sorry if I'm wrong , have a good day!

Answer:

The conversion rate is 1-liter equals 1000 milliliter.

Step-by-step explanation:

(24*500 + 15*1000) Total milliliters

(24*500 + 15*1000)/1000 Conversion Rate

Answer is 27 liters.

Answer:

ok let h square be x square

2695

Hope this helps you!

Answer:

1.898 ×10^27 kg for Jupiter

and for Neptune 1.024×10^26 kg

Answer:

Hola

Step-by-step explanation:

Answer:

755757

Step-by-step explanation:

Answer:

x=12

y=[tex]12\sqrt{3}[/tex]

Step-by-step explanation:

Hey There!

to solve this problem we need to use the 30 - 60 - 90 triangle rule

So you are correct on x because the hypotenuse is 2x

24/2=12

y would equal [tex]12\sqrt{3}[/tex]

as you could see in the image down below

Answer:

Perpendicular bisector

Step-by-step explanation:

Construction done:

1). An arc is drawn from point O which intersects line 'l' at two points C and D.

2). From the points C and D two equal arcs on both the sides of the line 'l' have been drawn intersecting each other at points P and Q.

3). Points P and Q have been joined with the help of a straightedge.

Hence constructed line PQ is the PERPENDICULAR BISECTOR of the line segment CD.

Answer:

B should be worth more points.

Step-by-step explanation:

Given -  Consider a randomly shuffled deck of ten cards labeled

              {1, 1, 2, 2, 3, 3, 4, 4, 5, 5}, of which game play requires three

               to be drawn.

To find - Which one should be worth more points:

              A getting a pair of matching cards within the three,

              or B getting a set of three cards that can be arranged such

              that the sum of two of them is the value of the third.

Proof -

Given that, three cards has to be drawn.

So, total number of ways the card be drawn = ¹⁰C₃

                                                                      = [tex]\frac{10!}{3! (10-3)!}[/tex]

                                                                      = [tex]\frac{10!}{3! 7!}[/tex]

                                                                      = [tex]\frac{10.9.8.7!}{3! 7!}[/tex]

                                                                      = [tex]\frac{10.9.8}{3.2.1}[/tex]

                                                                      = 120

⇒¹⁰C₃ = 120

Now,

Given that, A getting a pair of matching cards within the three

Sample space = { (1,1,2), (1,1,3).(1,1,4),(1,1,5);

                            (2,2,1),(2,2,3),(2,2,4),(2,2,5);

                             (3,3,1),(3,3,2),(3,3,4),(3,3,5);

                              (4,4,1),(4,4,2),(4,4,3),(4,4,5);

                              (5,5,1),(5,5,2),(5,5,3),(5,5,4) }

⇒n(A) = 20

Also,

B getting a set of three cards that can be arranged such that the sum of two of them is the value of the third

Sample space = { (1,1,2),(1,2,3),(1,3,4),(1,4,5),(2,2,4),(2,3,5) }

⇒n(B) = 6

Now,

P(A) = [tex]\frac{20}{120} = \frac{1}{6}[/tex] = 0.167

P(B) = [tex]\frac{6}{120} = \frac{1}{20}[/tex] = 0.05

We can see that, P(B) < P(A)

⇒B should be worth more points.

Answer:

x = 32

Angle 1 = 96

Angle 2 = 84

Step-by-step explanation:

3x + x + 52 = 180

4x + 52 = 180

     -52     -52

4x = 128

divide by 2

x = 32

___________________

1 = 3x

3(32)

1 = 96

___________________

2 = x + 52

2 = 32 + 52

2 = 84

Hope this helped! Have a nice day! Plz mark as brainliest!!!

-XxDeathshotxX

Answer:

3

Step-by-step explanation:

z+5=4=>z= -1

3(-1)+6=3

Answer:

angle abc =140°

and bd bisected by bd so, bd divede angle abc.

angle dbc= angle abc / 2

angle dbc=140°/2

angle dbc=70°

The measure of angle DBC from the given figure is 70°.

The measure of angle ABC is 140°.

The angle bisector in geometry is the ray, line, or segment which divides a given angle into two equal parts.

Angle bisector BD is bisecting angle ABC equally, which is

∠ABC=∠ABD+∠DBC

⇒ 140°=∠DBC+∠DBC

⇒ 2∠DBC=140°

⇒ ∠DBC=70°

Therefore, the measure of angle DBC from the given figure is 70°.

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Answer:

(3a + 11) (3a - 11)

Step-by-step explanation:

:))

Answer:

-2

Step-by-step explanation:

12=2+7d

7d= -12-2

7d= -14

d= -14

-----

7

d= -2

[tex]\huge\text{Hey there!}[/tex]

[tex]\large\textsf{-12 = 2 + 5d + 2d}[/tex]

[tex]\large\text{FLIP the EQUATION}[/tex]

[tex]\large\textsf{2 + 5d + 2d = -12}[/tex]

[tex]\large\text{COMBINE the LIKE TERMS}[/tex]

[tex]\large\textsf{\underline{(5d + 2d)} + \bf{(2)}}\large\textsf{ = (-12)}[/tex]

[tex]\large\textsf{5d + 2d = \underline{7d}}[/tex]

[tex]\large\textsf{2 = \bf 2}[/tex]

[tex]\large\textsf{-12 = -12}[/tex]

[tex]\rightarrow\large\text{New equation: }\large\textsf{7d + 2 = -12}[/tex]

[tex]\large\textsf{7d + 2 = -12}[/tex]

[tex]\large\text{SUBTRACT by 2 to BOTH SIDES}[/tex]

[tex]\large\textsf{7d + 2 - 2 = -12 - 2}[/tex]

[tex]\large\text{CANCEL out: \textsf{2 - 2} because that gives you \textsf{0}}[/tex]

[tex]\large\text{Keep: \textsf{-12 - 2}}\large\text{ because it helps you solve for d}}[/tex]

[tex]\large\textsf{-12 - 2 = -14}[/tex]

[tex]\rightarrow\large\text{New equation: \text{\underline{7d} = -14}}[/tex]

[tex]\large\textsf{7d = -14}[/tex]

[tex]\large\text{DIVIDE 7 to BOTH SIDES}[/tex]

[tex]\mathsf{\dfrac{7d}{7}=\dfrac{-14}{7}}[/tex]

[tex]\large\text{Cancel out: }\mathsf{\dfrac{7}{7}}\large\text{ because it gives you 1}[/tex]

[tex]\large\text{Keep: }\mathsf{\dfrac{-14}{7}}\large\text{ because it helps you solve for d}[/tex]

[tex]\mathsf{\dfrac{-14}{2}=-14\div 7\rightarrow \bf d}[/tex]

[tex]\large\text{Solve above and you will have your d {(aka your answer)}}\uparrow[/tex]

[tex]\mathsf{\dfrac{-14}{7}=\bf -2}[/tex]

[tex]\boxed{\boxed{\large\text{Answer: \huge \bf d = -2}}}\huge\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

Answer:

x=2.4 hours or 2 hours and 24 minutes together

Step-by-step explanation:

Answer:

It depends on the amount of tax. That also depends on the state of the sale.

Step-by-step explanation:

Answer:

13.33%

Step-by-step explanation:

I hope that is useful for you :)

Answer:

x=7/5

Step-by-step explanation:

12x+3x=15+6

15x=21

x=7/5

Answer:

X= [tex]\frac{7}{5}[/tex]

Step-by-step explanation:

Ok...

Get ready to see Alot more numbers

1. Rearrange terms.

12x-15=6-3x

12x-15=-3x+6

2. Add 15 to both sides.

12−15=−3+6

12−15+15=−3+6+15

3. Simplify

If you add the numbers you will get:

12x=-3x+21

4. Add 3x to both sides of the equation.

12x=-3x+21

12x+3x=-3x+21+3x

5. Simplify

If you combine the like terms you will get,

15x=21

6. Divide both sides of the equation by the same term.

15x=21

[tex]\frac{15x}{15}[/tex] = [tex]\frac{21}{15}[/tex]

7. Simplify

If you cancel terms that are in both of the numerator and denominator, then divide the numbers you will get:

x= [tex]\frac{7}{5}[/tex]

I hope this helps     :)

Answer:

4.64

Step-by-step explanation:

If you do 20% of 1.45, you would get 0.29, add that by 1.45 plus 1.45 plus 1.45, and you get 4.64. Hope this helps!

Answer:

$4.64

Step-by-step explanation:

3 x 1.45 = 4.35

1.45 x .2 = .29

4.35 +.29 = 4.64

Answer:

AB = 6.5

Step-by-step explanation:

C = 59°

AC = 7

CD = 6

AB = ?

Apply the Law of Cosines, which is AB² = AC² + CD² - 2(AC)(CD)*Cos(C)

AB² = 7² + 6² - 2(7)(6)*Cos(59)

AB² = 85 - 43.26

AB² = 41.74

AB = √41.74

AB = 6.5 (nearest tenth)

Step-by-step explanation:

n/2 + 3 < 20

50 >= 16- 2n

n / 2.83 > 100

Step-by-step explanation:

=20x14x;14x2x0;8x17;3x0;5x0;5y

=280x28x13;84x0;25y

=7840x3;46y

=27 126;4y

I just want to know what the person above/under me said.

Step-by-step explanation:

thanks

Answer:

60

Step-by-step explanation:

1/6 * 60 = 60/6

60/6 = 10/1 = 10

The number of 1/6 pound servings in 10 pounds of chicken is; 60

We are required to determine how many 1/6 pound servings are in 10 pounds of chicken.

Hence ; we have;

= 60.

Read more on divisions;

https://brainly.com/question/1622425

Answer:

255

Step-by-step explanation:

180+75=255

Answer:

4 in²

Step-by-step explanation:

A= l * w

A= 2 * 2

A= 4