27
6 boys have a mean age of 10 years.
14 girls have a mean age of 5 years.
Work out the mean age of all 20 children.

Answers

Answer 1

not clear way ..... clear it

Answer 2
10+5 =15
15 divided by 2 = 7.5

Related Questions

find the 17th term of the arithmetic sequence whose common difference is d=3 and whose first term is a1=5.

Answers

Answer:56

Step-by-step explanation:

Between 8:00 a.m. and 9:00 a.m., the temperature rose 2 degrees. Every hour after that, the temperature rose 3 degrees. At 12:00p.m., the temperature was 72°F. What was the temperature at 8:00 p.m.?

Answers

72-3=69-3=66-3=63-2= 61°???

How is a decimal changed into a percent?
Divide by 100 and add a percent sign.
Move the decimal two places to the right, multiply by 100 and then add a percent sign.
Move the decimal two places to the right and add a percent sign.
Move the decimal two places to the left and add a percent sign.

Answers

Answer:

Move the decimal two places to the right and add a percent sign.

Step-by-step explanation:

.15= 15%

1.25= 125%

.06= 6.0, or 6%

Answer:

To convert a percent to a decimal, we move the decimal point 2 places to the left, just as we did when we were dividing by 100.

Step-by-step explanation:

five times a certain number plus 5 is 45​

Answers

Answer:

8

Step-by-step explanation:

8x5=40 + 5 = 45

That's the answer

Answer:

8.

Step-by-step explanation:

five times 8 is 40. add five is 45.

Good afternoon!

I am here with a handful of geometry questions today. Please answer the question based off the image(s) below.

If you are not sure of the answer please leave a comment, DO NOT ANSWER THE QUESTION UNLESS YOU KNOW THE ANSWER. Please don't take me points! Thanks for understanding.

Anyways, please show all of your work and explain your thinking! Thanks!

Answers

9514 1404 393

Answer:

  5) 112°

  6) 40°

Step-by-step explanation:

5) The angle E or ? is half the sum of the intercepted arcs:

  ? = (130° +94°)/2 = 112°

__

6) The angle D is half the difference of the intercepted arcs:

  ? = (135° -55°)/2 = 40°

A recent study estimated that 68% of US adults enjoy reading a book while relaxing. How many adults are required
for a random sample to obtain a margin of error of at most 0.05 with 90% confidence?
A.236
B.271
C.335
D.578

Answers

Answer:

Step-by-step explanation:

236, did on edge

The blue lines in the picture are marked out because its not important.
Can you find the Area​

Answers

Answer:

We have to use heron’s formula to find the area of the triangle.   Here a=7cm, b=9cm and c=12cm  s = (a+b+c)/2 = (7+9+12)/2 = 28/2 = 14  Area of the triangle = √s(s-a)(s-b)(s-c)  = √14(14-7)(14-9)(14-12) = √14×7×5×2 = √2×7×7×5×2 = √5×(2×2)×(7×7) = 14√5 cm^2  Hence area Of the triangle is 14√5 cm^2.

52.76= 52+0.7+____

i hate this app a bit

Answers

Answer:

52.76= 52+0.7+52.76

Step-by-step explanation:

Help please I suck at math

Answers

Answer:

1 biodata is on my class then you will contact or person

Answer:

hey

Step-by-step explanation:

what is the y intercept of this line​

Answers

Answer:1

Step-by-step explanation:

How Do You Find the X- and Y-Intercepts of a Line in Slope-Intercept Form? To find the x-intercept of a given linear equation, plug in 0 for 'y' and solve for 'x'. To find the y-intercept, plug 0 in for 'x' and solve for 'y'. The Y-Intercept of a line is the point where a line's graph intersects (crosses) the Y-axis. A y-intercept of 3 means that a line's graph intersects the Y-axis at the point (0, 3). A y-intercept of -4 means that the graph of a line crosses the Y-axis at the point (0, -4).

At Walmart there is a jacket for $75, you have a coupon for 30% off. How much is the price of the jacket after the sale? How much was saved?

Answers

Answer:

Price after sale = $52.5

Amount saved = $22.5

Step-by-step explanation:

Cost of Jacket - $75

Percentage off = 30%

Discount price = 30% of $75

Discount price = 0.3 * 75

Discount price = $22.5

Price after sale = Original cost - Discount price

Price after sale = 75-22.5

Price after sale = $52.5

The amount saved = 75 - 52.5

The amount saved = $22.5

What is the slope of the person who types words faster words (greater slope) per minute? (type just the number).

Answers

i think it is 82 but i could be wrong

A sine function has the following key features: Period = 4pi Amplitude = 2 Midline: y = 3 y-intercept: (0, 3) The function is a reflection of its parent function over the x-axis.

did I get this right?

Answers

The sine function is:

f(x) = -2*sin(x/2) + 3.

So you got it almost correctly, you only forgot to apply the reflection.

How to get the sine function?

We start with the general sine function:

[tex]a*g(w*x + p) +m[/tex]

where g(x) = sin(x)

a is the amplitude, which we know is equal to 2.w depends on the period.M is the midline, which we know is equal to 3.p is the phase shift, because the y-intercept is (0, 3) we know that:

f(0) = 2*sin(w*0 + p) + 3 = 3

      = 2*sin(p) + 3 = 3

Then we must have p = 0, so there is no phase shift.

We also know that we have a reflection over the x-axis of the parent sine function, we would actually have:

f(x) = 2*-sin(wx) + 3

Finally, to get the value of k we know that the period of the general sine function is 2*pi, while here is 4*pi, then we must have w = 1/2 to get the correspondent correction, so the function is:

f(x) = -2*sin(x/2) + 3.

This is almost the same thing that you got in the graph, where you only forgot to apply the reflection over the x-axis of the parent function.

If you want to learn more about sinusoidal functions, you can read:

https://brainly.com/question/18055768

Answer:

I know this is a year late, but I took this test it was quite challenging so here is my answer for you I took a picture of the graph because it's hard to graph without any reference pictures

hope this helps

i got 10.6 am i wrong?

Answers

Answer:

15.3

Step-by-step explanation:

because 15 is the number I think

6. Select all the inequalities that have the same solutions as -4x < 20.
A. -x > 5
B. 4x > -20
C. $4x
D. $x
E. x > 5
F. x > -5

(From Unit 6, Lesson 13.)

Answers

Answer:

F and B (as far as I can see).

Step-by-step explanation:

First, let's simplify the equation. You can easily do this by dividing by -4.

                                                  -4x < 20

                                                   /-4    /-4

                                                      x > -5

REMEMBER- Whenever dividing or multiplying a negative number with inequalities, the sign flips!!

On A, we can see that it has a negative symbol, but if we were to divide that, the sign would flip, making -5 greater than x. That's not what we want.

On B, the 20 is negative instead of the 4. Does this change anything?

                                                   4x > -20

                                                   /4    /4

                                                      x > -5

Nope! It still simplifies to what we had at the beginning so it works!

C and D are slightly confusing me because, well, I don't really see how it's relevant to anything so... It doesn't even have a inequality symbol so I don't know lol.

E is wrong because we need the 5 to be positive.

F is obviously right compared to our first answer.

Answer: F, b, a

Step-by-step explanation:

Find the measure of each angle listed to the right.

(Plsss solve)

Answers

Answer:

JML is 26 degrees.

PMN is 64 degrees.

NMK is 26 degrees.

How to understand the area of triangles using height and base

Answers

The area of a triangle is 1/2 x base x height.

When you know the base and the height of a triangle, multiply them together, than multiply by 1/2 ( this is the same as dividing it by 2).

Answer:

Base times height divided by 2 = area.

What is the image of (-8,-7) after a dilation by a scale factor of 2 centered at the origin?

Answers

Answer:

The image is (-16,-14)

Step-by-step explanation:

Given

Represent the point with A

[tex]A = (-8,-7)[/tex]

[tex]Scale\ factor = 2[/tex]

Required

Determine the image (A')

The image is calculated as:

[tex]A' = A * Scale\ factor[/tex]

[tex]A' = (-8,-7) * 2[/tex]

So, we have:

[tex]A' = (-8* 2,-7* 2)[/tex]

[tex]A' = (-16,-14)[/tex]

Hence, the image is (-16,-14)

PLEASE HELP 2O POINTS

What function is graphed below



y = x - 3
y = 3x
y = - 1
y = x + 3

Answers

Answer:

the answer is the third one :)

Step-by-step explanation:

Answer:

number 3

Step-by-step explanation:

Bob gets the following homework grades:

2, 2, 2, 2, 2, 10, 10, 10, 10, 10.

Tom gets the following homework grades:
7, 7, 7, 7, 7, 7, 7, 7, 7, 7

Pat gets the following homework grades:

1, 1, 8, 8, 8, 8, 8, 8, 10, 10

Required:
Find the mean homework grade for each student, find the median homework grade for each student, and ESTIMATE the standard deviation for each student.

Answers

Step-by-step explanation:

for bob;

his grades = 2, 2, 2, 2, 2, 10, 10, 10, 10, 10.

total = 60

mean = total/n

= 60/10 = 6

meadian is the middle value in the set of scores. the numbers are even so =

2+10 / 2

median = 12/2 = 6

standard deviation using excel = 4.216

for tom

7, 7, 7, 7, 7, 7, 7, 7, 7, 7

total = 70

mean = 70/10 = 7

median = 7+7/2 = 14/2 = 7

standard deviation using excel = 0

for pat:

1, 1, 8, 8, 8, 8, 8, 8, 10, 10

total = 70

mean = 70/10 = 7

median   =  8+8/2 = 16/2 = 8

standard deviation using excel = 3.265

The mean monthly temperature for the year 1900 is 53.75. The Mean Absolute Deviation for the temperatures in 1900 is approximately 15 degrees The mean monthly temperature for the year 2017 is 56.25 degrees. The Mean Absolute Deviation for the temperatures in 2017 is 13.7 Is there a meaningful difference between the two mean monthly temperatures? Your answer must reference the number of MADs that separate the two means.

Answers

Answer:

the mean is 4.86 & the mad is 1.91 hope this helped you and pls give me the Brainly crown

Step-by-step explanation:

you deposit $1,300 in an account that pays 4% interest compounded yearly find the Balance after 3 years​

Answers

Answer:In 3 years, you will have $1,462.32

Step-by-step explanation:

A B C D
100
Which letter is a good estimation of 55 on the number line?
A)
А
B)
B
C)
C С
D)
D

Answers

Answer:

b or d

Step-by-step explanation:

The value of cos47° is equal to​

Answers

Answer:

Decimal form = 0.68199836

Find the slope of the line.
Y=5/3x

Answers

Answer:

[tex] \frac{5}{3} [/tex]

~ See attatchment

Step-by-step explanation:

I'm unsure what you want me to do here, so I drew a graph (using Desmos) and the slope.

The slope is given, 5/3. The slope-intercept equation is usually y = mx + b -- m being the slope and b being the y-intercept.

Hi!

Let's check if the equation that we're going to work with is in slope-intercept form.

Remember, the slope-intercept formula is:

                                   [tex]\diamondsuit~~~\boldsymbol{y=mx+b}[/tex]

Where:

m -> Slopeb -> Y-intercept

Details:

[tex]\boxed{\\\begin{minipage} {8cm}\sf{Slope = coefficient \ of \ x, \ or \ the \ number \ before \ x.}\\\sf{Y-intercept = \ a \ number \ added \ to \ or \ subtracted \ from \ the \ slope.} \end{minipage}}[/tex]

Therefore:

[tex]\stackrel{\heartsuit}{\boxed{\boxed{\textsc{Slope:}\quad\boldsymbol{\displaystyle\frac{5}{3}}}}}[/tex]

I hope I helped, have a wonderful day!

If you need any explanation or clarification, reach out to me, I'm always happy to help. :D

ABC is a triangle.
Work out the size of the angle marked p.

Answers

Answer:

p= angle180_(50+70)

p=180_120

angle p=60

Mary has 10/12 of ube cake she shared 7/12 to ana. what part of cake was left to mary?​

Answers

Answer:

3/12

Step-by-step explanation:

10-7 is 3, so its 3/12.

Rearrange b = c + xd to make x the subject of the formula.​

Answers

Answer: x = (b-c)/d

Step-by-step explanation:

xd + c = b

xd = b-c

x = b-c/d

2y+x+4z + 3x +9y+ 3z

Answers

2y+9y+x+3x+4y+3y

11y+4x+7z

11y+4x+7z
not sure what the question is but my guess is add the like terms together

A rectangular gift box has dimensions that can be represented as shown in the figure. The volume of the box is 56w cubic inches. Which of the following is not a dimension of the box?

Answers

The dimension of the box is 12 by 7 by 8

How to calculate the volme of  a box

The volume of the box = lwh

Given the following

l = w

w = w - 5

h = w - 4

Hence;

w(w-5)(w-4) = 56w

Expand to have

(w^2-5w)(w-4) = 56w
w^3 - 4w^2 - 5w^2 + 20w = 56w
w^3 -9w^2 - 36w = 0

Factorize to get the value of w;

w(w^2-9w-36)=0

w^2 - 12w + 3w - 36 = 0

w(w-12) + 3(w-12)= 0
w = -3 and 12

Hence the dimension of the box is 12 by 7 by 8

Learn more on volume of box here: https://brainly.com/question/15532376

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