In a class of 30 students, the mean height of the 12 girls is 164 cm and the mean height of the 18 boys is 166 cm. Find the mean height of the whole class.​

Answers

Answer 1

Answer:

Mean between 164 and 166 is

Step-by-step explanation:

Mean between 164 and 166 is


Related Questions

The savings account offering which of these APRs and compounding periods

offers the best APY?


A. 4.0784% compounded monthly

B. 4.0792% compounded quarterly

C. 4.0730% compounded daily

D. 4.0798% compounded semiannually

Answers

Answer:

The answer is "Option C"

Step-by-step explanation:

The using formula[tex]= (1+\frac{r}{n})^n -1[/tex]

→r = rate

→ n = compounded value

In choice a:

When compounded is monthly [tex]4.0784\%[/tex]  

[tex]n = 12[/tex]

[tex]\to (1+ \frac{0.040784}{12})^{12} = 1.0403-1 = 0.0403[/tex]

In choice b:

When compounded is quarterly[tex]4.0792\%[/tex]

[tex]n = 3\\\\\to (1+ \frac{0.040792}{12} )^{3} = 1.0102-1 = .0102[/tex]

In choice c:

Whenn compounded is daily [tex]4.0730 \%[/tex]

[tex]n = 365\\\\\to (1+ \frac{0.040730}{12})^{365} = 3.328-1 = 2.328[/tex]

In choice d:

When compounded is semiannually[tex]4.0798\%[/tex]

[tex]n = 2\\\\\to (1+ \frac{0.040798}{12})^{2} = 1.0066-1 = 0.0066[/tex]

which of the following equations has a unique (one) solution, no solution, or many
11x+4=3x+12

Answers

Answer:

x=1

Step-by-step explanation:

11x+4=3x+12

11x=3x+8

8x=8

x=1

Hope this helps!

-AxekickNebulite

HELPPP PLSSS lol help

Answers

Answer:

1)48

2)25

3)21

Step-by-step explanation:

Answer:

8:48

5:25

21:35

Step-by-step explanation:

for any ratio, it stays the same if you multiply left and right with the same number.

So let's take the last one:  

3 : 5 should be equivalent to ? : 35

How did 5 get to be 35? It was multiplied by 7.

So we do that on the left side as well.

3×7 = 21.

Conclusion: 21:35 is equivalent to 3:5

Isosceles trapezoid ABCD is shown below with a line EF drawn through its center. If the isosceles trapezoid is dilated using a scale factor of one half and a line is drawn through the center of the new dilated figure, what relationship will that line have with line EF in the drawing below? (10 points)

Answers

Answer:

the answer for e is -2 and f is 2

Step-by-step explanation:

because if ever look at it E and F are straight from each other so one would be a negetive nunber and the other would be a positive number.

holaaaaaaaaaaaaaaaaaaaaaaaaaa

Answers

Answer:

HIIIIIIIIIIII

Step-by-step explanation:

HIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Help me out:( Don’t forget to explain pls :(

Answers

Answer:

When you find the volume of a triangle, remember to do this:

Step-by-step explanation:

Multiply the base times the height, then divide by two.

:)

The mistake is in the second triangle and is noticeable at first because the length of the leg is longer than the length of the hypotenuse.

Since this is a 30 60 90 triangle, you can use the properties that apply to them. I'm assuming that the leg with the length of 62ft is the given side. Using the rules, we know that x/2 is 62 (since the properties of a 30 60 90 triangle state that the shortest side is x/2). In order to find the hypotenuse (which is x), we can multiply both sides of the equation x/2 = 62 to get x = 124. To find the second leg, we need to use sqrt(3)*x/2, which when you plug in 124, gives 107.39. Andrea just switched the lengths of the second leg and the hypotenuse on accident.

Let gbe a function such that g(x) = -2r + 5 and is defined on the domain (-1,3) State the range of this function in interval notation.​

Answers

Answer:

The range interval is: (7, -1)

Step-by-step explanation:

Given the function

g(x) = -2r+5

As the domain is (-1, 3)

Let us put the domain values in the interval (-1, 3)

Putting x = -1

g(x)=-2r+5

      = -2(-1)+5

      = 2+5

      = 7

Putting x = 0

g(x)=-2r+5

      = -2(0)+5

      =0+5

      = 5

Putting x = 1

g(x)=-2r+5

      = -2(1)+5

      =-2+5

      = 3

Putting x = 2

g(x)=-2r+5

      = -2(2)+5

      =-4+5

      = 1

Putting x = 3

g(x)=-2r+5

      = -2(3)+5

      =-6+5

      = -1

Thus the range interval is: (7, -1)

the set of all real numbers less than 50 or greater than 50
helppp​

Answers

The set notation of the numbers is {x | x < 50 ∪ x > 50}

How to determine the set notation of the numbers?

The set is given as

The set of all real numbers less than 50 or greater than 50

Let the number be represented by x

So, we have

x less than 50 or x greater than 50

When represented as an inequality, we have

x < 50 or x > 50

Using set notation, we have

{x | x < 50 ∪ x > 50}

Hence, the set notation of the numbers is {x | x < 50 ∪ x > 50}

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The executive chef is in charge of the food quality and does not need to worry about sanitation issues such as pest control.


False

True

Answers

Answer:

False

Step-by-step explanation:

False. You wouldn’t want a rat in your food.

A farmer wanted to estimate how many moles were living on his property, so he marked 24 of them with tags. A few weeks later, the farmer drove around his property and noticed 18 tagged moles out of the 330 moles he counted. To the nearest whole number, what is the best estimate for the mole population?

Answers

Answer:

The answer is 70 moles

Step-by-step explanation:

For the farmer,

Total no of Moles = 330

No of marked moles with tags = 24

No of unmarked moles = 330 - 24 = 306

Few weeks later,

No of tagged moles found = 18

No of tagged moles not found,

= marked moles with tags - tagged moles found

= 24 - 18 = 6

Therefore, if for every 24 tagged moles, there are 6 moles found,

288 tagged moles = 24 X 12 (lots) = 288

For moles found = 6 X 12 (lots) = 72

To the nearest whole number,

The best estimate for the mole population would be 70 moles

Find the value of the unknown angle X.
158°
51°
21°
The diagram is not drawn to scale.
O
2 =
O

Answers

Answer:

x = [tex]130^{o}[/tex]

Step-by-step explanation:

The given figure is a trapezium which is a quadrilateral with four sides.

But,

Sum of angles in a quadrilateral = (n - 2) x 180

where n is the number of sides.

For a quadrilateral, n = 4. So that,

Sum of angles in a quadrilateral = (4 - 2) x 180

                             = 2 x 180

                             = [tex]360^{o}[/tex]

The sum of angles in a quadrilateral is [tex]360^{o}[/tex].

Thus,

[tex]158^{o}[/tex] + [tex]51^{o}[/tex] + [tex]x^{o}[/tex] + [tex]21^{o}[/tex] = [tex]360^{o}[/tex]

[tex]x^{o}[/tex] + [tex]230^{o}[/tex] = [tex]360^{o}[/tex]

[tex]x^{o}[/tex] = [tex]360^{o}[/tex] - [tex]230^{o}[/tex]

   = [tex]130^{o}[/tex]

The value of x is [tex]130^{o}[/tex].

Please help me out with this problem

Answers

Answer:

Second choice, 2/5

Step-by-step explanation:

12 + 9 + 10 + 11 + 8 = 50

12 red and 8 blue, the probability of getting either is 12 + 8 = 20/50 which simplified is 2/5

A line that includes the point (0, 9) has a slope of 9. What is its equation in slope-intercept
form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.
Submit

Answers

Slope intercept: y = mx + b
Y = 9x + b, plug in point
9 = 9(0) + b, b = 9
Solution: y = 9x + 9

1

4 of the students in the class received an A on the test. If there are 48 students in the class, how
many DID NOT get an A on the test

Please show the work

Answers

Answer:

36 did not get an A on the test

Step-by-step explanation:

48/4*3=36

Please help meee……………..

Answers

Answer 5 inches
Answer by pythagorean theorem

Answer:

Step-by-step explanation:

redraw the diagrams separately now you have a rectangle and a trianglebc=12 inchesAttached is the whole processHOPE THIS HELPS

Which expression is equivalent to (8x^3) 2/3? select all that apply.
A. 4x^2
B. 4x^3
C. √8x^9
D. √(8x^3)^3

Answers

Answer:

A

Step-by-step explanation:

Here, we simply want to select the indices that is equivalent to the given expression

(8x^3)^2/3

That is same as;

8^2/3 * x ^3 * 2/3

That will be;

2^2 * x^2

= 4x^2

Urgent !!!! write the equation in form y= mx + b ( slope intersect !)

Answers

It said the answer needed to be at least 20 characters long y=50x+25

Convert 83 to Fahrenheit. Show your work.
it’s like math but it’s stem too so can someone help me plz and show work i need it by today !

Answers

Step-by-step explanation:

(F-32)* 5/9 = C

(83 -32) * 5/9 = 28 + 1/3

Choose the best answer for the missing number.

Answers

Answer:

1/100

Step-by-step explanation:

This is just digits...

57.237 = 50+7+0.2+3*___+0.007

well if you take a closer look

57.237 = 57.207 + 3*___

0.03 = 3*___

So you must have 0.01 for that spot, or if we follow the format of the question, you rewrite it as 1/100

Answer:

0.01 or 1/100

What is the slope of a line that is perpendicular to a line whose equation is −6y=2x+7?
30 points and brainliest!

Answers

Answer:

The perpendicular slope is 3.

Explanation:

[tex]\sf slope\:intercept\:form :y = mx + b[/tex]

where:

m = slopeb = y-intercept

Given equation:

[tex]-6y=2x+7[/tex]

divide both sides by -6

[tex]\dfrac{-6y}{-6} =\dfrac{2x+7}{-6}[/tex]

simplify

[tex]y=\dfrac{2x}{-6} +\dfrac{7}{-6}[/tex]

when simplified more:

[tex]y=-\dfrac{1}{3}x -\dfrac{7}{6}[/tex]

Here the slope is -1/3

- - - - - - - - - - - - - - - - - - - - - - - -

[tex]\sf m_1 \times m_2 = -1[/tex]

where:

m1 = parallel slopem2 = perpendicular slope

Find perpendicular slope:

[tex]\sf -\dfrac{1}{3} \times m_2 = -1[/tex]

[tex]\sf m_2 = 3[/tex]

5. the difference between x and 7, divided by 3​

Answers

Answer:

x - 7 ÷ 3 or

x - 7

-------- <------ fraction bar/line

3

Step-by-step explanation:

If you are trying to write the the difference between x and 7, divided by 3 then the answer is above.

hope this helps :)

Uh I need help with this I cant figure it out​

Answers

Sum of it is blurred out by the light srry

What is the slope of a line parallel to the line whose equation is 3x−2y=18. Fully reduce your answer.

Answers

Answer:

3/2x

Step-by-step explanation:

-2y = -3x+18

y = 3/2x-9

Answer:

Slope: [tex]\frac{3}{2}[/tex]

Step-by-step explanation:

3x - 2y = 18

-2y = -3x + 18

y = [tex]\frac{3}{2}[/tex]x - 9

Slope = [tex]\frac{3}{2}[/tex]

how many pepper plants are in 3 plants

Answers

Answer:

tatlo

Step-by-step explanation:

dependi sa lalagyan

PLEASE ANSWER CORRECTLY!!! I REALLY NEED AN ANSWER! WILL MARK BRAINLIEST!!!!



Misha solves the following system of equations using the substitution method.

y=5−2x
3x−y=15

What is the single-variable equation she solves after substituting?


A. 3(5+x)=5−2x

B. 15+3x=5−2x

C. 3x−(5−2x)=15

D. 3x−5−2x=15

Answers

Answer:

C

Step-by-step explanation:

The single equation of the system of equation y=5−2x and 3x−y=15 by substitution will be  3x−(5−2x)=15 thus option (C) will be correct.

What is the equation?

There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.

As per the given system of equations,

y = 5 − 2x

3x − y = 15

Substitute y = 5 - 2x into 3x − y = 15

3x - (5 - 2x) = 15

Hence "The single equation of the system of equation y=5−2x and 3x−y=15 by substitution will be  3x−(5−2x)=15".

For more about the equation,

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Write (point slope form) and graph given a point and slope (3,7) and
m=4/3.

Answers

Step-by-step explanation:

equation is:

y=4/3 X+C

to find C use(3,7)

7=4/3×3 +C

C= 3

therefore ...

y=4/3X+3

3y=4X+ 9

PLEASEE FRIKEN HELP MEEEEEEEEEEEEEEEEEEEE
Whats 7x8(9+8)-6x7+2(77x8)-7+1092(2010x0.1134)+17-27=
Its my math question

Answers

Answer:

251028.928

Step-by-step explanation:

i used a calculator

The result of the expression 7 x 8(9 + 8) - 6 x 7 + 2 (77 x 8) - 7 + 1092 (2010 x 0.1134) + 17 - 27  will be 251028.928 .

Given , expression 7 x 8(9+8) - 6 x 7 + 2(77 x 8) - 7 + 1092(2010 x 0.1134) + 17 - 27.

Apply BODMAS to solve the expression.

B = Bracket

O = of

D = Division

M = Multiplication

A = Addition

S = Subtraction

Following the same order,

7 x 8(9+8) - 6 x 7 + 2(77 x 8) - 7 + 1092(2010 x 0.1134) + 17 - 27

= 952 - 42 + 1232 - 7 + 248903.928 + 17 - 27

= 251028.928

Know more about BODMAS,

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In the figure, XU=−4y+ 20 and XW=6y+ 10. Find the radius of the inscribed circle of △RST.

Answers

Answer:

16

Step-by-step explanation:

Answer:

Step-by-step explanation:

Did u find it

Please help meeee! I will mark brainliest if right

Answers

Answer:

x=

[tex] \frac{3}{4} [/tex]

Answer:

Fraction: x= 3/4 Decimal: x= 0.75

To compare and order fractions,the fraction can be written with a​

Answers

common denominator i believe. i’m not sure. hope this helps
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