The mean age of 5 boys is equal to 9.8. Furthermore, the mean age of 15 girls is 10.2. The mean age of the 20 children together is equal to:

Answers

Answer 1

Anqwerty123

Step-by-step explanation:


Related Questions

Bethany bought a box of markers. She gave 6 to her friend. If Bethany now has 52 markers, how many markers were in the box she bought?

Answers

Answer:

58 markers

Step-by-step explanation:

52 + 6 = 58

Answer:

58 markers

Step-by-step explanation:

x-6=52 Set up the problem. "x" represents the number of markers.

 +6 +6 Add 6 to both sides to isolate x

x    =58

The coordinates of a rectangle are (3, 0), (3, -5), (-4, 0) and (-4, -5). What is the length of this rectangle?

Answers

Answer:

7

Step-by-step explanation:

0 to 3=3

0 to -4= 4

4+3=7

Please help me with the question please ASAP ASAP I’m begging please

Answers

Answer: a= 144. b= 67

Step-by-step explanation:

Angle b and the angle of measure 113 are same side interior angles which sum to 180 (When 2 parallel lines are cut by a transversal, special angles are formed)

113+b=180. Subtract 113 from both sides.

b= 67 degrees

Now that you have b, the interior angles of four sided figures sum to 360.

a+113+67+36=360. Combine like terms.

a+216=360. Subtract 216 from both sides.

a= 144 degrees

Layla has 3/4 of a can of paint. She uses 2/3 of that plant. What fraction of the can did she use?

Answers

Answer:

its cuz ur computer is upside down

Step-by-step explanation:

add it all up

The coordinates of the vertices of a triangle are A( 2,3) , B ( 9,1) , C ( 12,14) Suppose each coordinate is multiplied by 3. What is the perimeter of this triangle?







Answers

9514 1404 393

Answer:

  about 106.5 units

Step-by-step explanation:

The length of each side is found using the distance formula:

  d = √((x2-x1)^2 +(y2-y1)^2)

For example, the length of side AB is ...

  d = √((9 -2)^2 +(1 -3)^2) = √(7^2 +(-2)^2) = √53 ≈ 7.28

The other side lengths are calculated the same way. The sum of side lengths of the given triangle is ...

  AB +BC +CA = 7.28 +13.34 +14.87 = 35.49

__

Multiplying each coordinate by 3 effectively dilates the triangle by a factor of 3 about the origin. That increases the perimeter by a factor of 3, so it is ...

  3(35.49) ≈ 106.5 . . . . units

_____

I find it convenient to use a calculator or spreadsheet to do the tedious calculations.

10.
The rate of change is constant in each table. Find the rate of change. Explain what the rate of change means for the situation.


Time (days)
Cost ($)
3
75
4
100
5
125
6
150

A. [tex]\frac{1}{25}[/tex] dollars per day; the cost is $25 for each day.

B. [tex]\frac{75}{1}[/tex] dollars per day; the cost is $75 for each day.

C. [tex]\frac{25}{1}[/tex] dollars per day; the cost is $25 for each day.

D. [tex]\frac{1}{150}[/tex] dollars per day; the costs $1 for 150 days

Answers

Answer:  C. (25)/(1) dollars per day; the cost is $25 for each day.

$25/ 1 day or $25 a day

Step-by-step explanation:

Answer:

The rate of change is 25. It means the cost increased by $25 per day.

Step-by-step explanation:

The given table is

Time (days)       Cost ($)

      3                   75

      4                  100

      5                  125

      6                  150

It means the graph of this constant function passing through the points (3,75) and (4,100).

If a line passing through two points, then the slope of the line is

Therefore the rate of change is 25. It means the cost increased by $25 per day.

12.
60°
X
20
у
Need help

Answers

frbthegjtefyhrgbfrbrbrbrb

Bonsoir ,est ce que vous pouvez m'aidez svp l'ennoncer est ci-dessous. Yann est un fidèle client du magasin qui se situe juste à côté de chez lui. Il y achète ton son matériel d'informatique. Aujourd'hui, il veut s'offrir un disque dur externe au prix de 78,75 euros. Sa carte de fidélité lui a permis d'obtenir de 10 euros à utiliser dans le magasin. Sur le site internet du magasin, il peut bénéficier d'une remise de 20% , mais il doit payer 5,95 euros de frais de port. Quelle offre est plus bénéfique pour Yann.

Answers

Answer:

English please?

Step-by-step explanation:

Kylie recorded the number of squats she could do on each day of her training is the relation a function explain?

Answers

Answer:

The second one

Step-by-step explanation:

Yes. Each input (day) has exactly one output (number of squats). (I think lol)

Which of the following could be the lengths of the sides of a 45°-45°-90° triangle?

Answers

Answer:

[tex]the \: answer \: is \: \: {b}[/tex]

Select 3 ratios that are = to 11:1

Answers

22:2 33:3 44:4
Hope this helps

The transformation is a translation.

- true
- false

Answers

Answer:

I think it's would be True

bc you are moving by the same distance and the shape isnt changing.

Find the value of variable x. If your answer is not an integer, write it in simplest radical form with the denominator rationalized
x=
(Simplify your answer. Type an integer or a simplified fraction.)

Answers

Answer:

Step-by-step explanation:

It is a 30°-60°-90° triangle.

The lengths of the sides of a 30°-60°-90° triangle are in the ratio 1:√3:2.

The side opposite the 90° angle has length 4, so the side opposite the 30° angle is 2.

x = 2

Ahmed owns a land of breadth (x+7) units &having an area of 2+ 14x + 49 sq. Units. (i)Find its length.

Answers

Answer:

l = (x+7) units

Step-by-step explanation:

Given that,

Breadth of the rectangle, b = (x+7) units

Area of the rectangle, [tex]A=x^2+14x+49[/tex]

The area of a rectangle is given by :

[tex]A=lb\\\\l=\dfrac{A}{b}\\\\l=\dfrac{(x^2+14x+49)}{(x+7)}\\\\l=\dfrac{(x+7)^2}{(x+7)}\\\\l=(x+7)\ \text{units}[/tex]

So, the length of the land is (x+7) units.

the ratio of two number is 7 to 3 and their sum is 50 find the two number​

Answers

Answer:

35:15

Step-by-step explanation:

7:3=10 (7+3)

14:6=20 (14+6)

21:9=30 (21+9)

28:12=40 (28+12)

35:15=50 (35+15)

There is a more mathematical way to solve this but it isn't coming to mind rn so

Academy is offering a 12% discount on all of their sporting good supplies. What would be the sale cost of a basketball with an original price of $140?

Answers

123.2 dollars for the sale price.

Answer:

$123.20

Step-by-step explanation:

First, convert 12% into a decimal, 12% = .12, now we multiply the discount by the original, so .12x140 which equals $16.80 then we subtract 16.8 from 140 giving you $123.20.

15 + 6 × 2 =

use order of operations​

Answers

Answer:

27

Step-by-step explanation:

Multiply first, then add

Answer:

27

Step-by-step explanation:

15+6*2=15+12=27

NEED HELP ASAP BEING TIMED ON THIS !!!

Answers

Answer:

b

Step-by-step explanation:

B. 3 1/2 is the answer

Please help I will mark Brainiest (No links please)

Answers

Answer:

72 bags

Step-by-step explanation:

you would do the area(108) times 6 since you would be stacking, then you divide by 9, since you want to see how much sand would be in each bag, so you would have 72 bags

Answer:

72

Step-by-step explanation:

H+ ions increase in concentration at lower pH values. Calculate how many more H+ ions there are in a solution at a pH = 2 than in a solution at a pH = 6. Find the concentration of H+ ions at a pH = 2 and at a pH = 6 in Table B. Then divide the concentration of H+ ions at a
pH = 2 by the of H+ ions at a pH = 6. Record your answer in Table C.

What is the concentration of H+ ions at a pH = 2?

mol/L

What is the concentration of H+ ions at a pH = 6?

mol/L

How many more H+ ions are there in a solution at a
pH = 2 than in a solution at a pH = 6?

Answers

Answer:

What is the concentration of H+ ions at a pH = 2?

⇒ 0.01 mol/L

What is the concentration of H+ ions at a pH = 6?

⇒ 0.000001 mol/L

How many more H+ ions are there in a solution at a

pH = 2 than in a solution at a pH = 6?

⇒ 10,000

Step-by-step explanation:

Answer:

What is the concentration of H+ ions at a pH = 2?

0.01

 

What is the concentration of H+ ions at a pH = 6?

0.000001

 

How many more H+ ions are there in a solution at a

pH = 2 than in a solution at a pH = 6?

10,000

Step-by-step explanation:

Is 1.52 a irrational number

Answers

Answer:

yes

Step-by-step explanation:

Answer:

It is rational

Step-by-step explanation:

1.52 = 1 + 52/100 = 152/100 which is rational, because it can be expressed as a fraction

Find two integers whose sum is 0 and product is -64

Answers

Answer:

-8 and 8

Step-by-step explanation:

-8*8 = -64

-8+8=0

help me solve for x ?

Answers

the answer would be x=12

Answer:

x = 12

Step-by-step explanation:

[tex](4x - 5) \degree +(3x + 11) \degree = 90\degree \\(complementary \: \angle s) \\ \\ (4x - 5 + 3x + 11)\degree = 90\degree \\ \\ (7x + 6)\degree = 90\degree \\ \\ 7x + 6 = 90 \\ \\ 7x = 90 - 6 \\ 7x = 84 \\ \\ x = \frac{84}{7} \\ \\ x = 12[/tex]

Kenny borrows $500 from hls friend to buy a PS5. He promises his friend he will pay him back 7% simple interest in one year. How much will Kenny pay back in total?

Answers

he will pay back $350

Tickets to the zoo cost $8 per child and $12 per adult. The zoo sold $5500 in tickets yesterday.
a. Write an equation to model the ticket sales for yesterday. Use c to represent child tickets
and a to represent adult tickets.
b. 125 more child tickets than adult tickets were sold. That can be modeled using the equatic
c = 125 + a. How many child tickets were sold? How many adult tickets were sold? Show
your work.

Answers

Answer:

a.   12a + 8c = 5500

b.    225 adult tickets

      350 child tickets

Step-by-step explanation:

a.    12a + 8c = 5500

b.     12a + 8(125 + a) = 5500

        12a + 1000 + 8a = 5500

                  20a = 4500

                       a = 225 adult tickets

            125 + a = 125 + 225 = 350 child tickets

Need help
What specific measure of a geometric figure is shown in the image?

A. A 15° angle
B. A 180 mm side length
O C. A 165 mm side length
O D. A 165° angle

Answers

Answer:

b

Step-by-step explanation:

can you help me with my question In the extended simile of the underlined passage from Paragraph 15 of "A Wagner Matinee," the narrator makes an observation about the soul that aring rokol been A. it is like a strange moss on a dusty shelf that, with excruciating suffering, can wither and die y for I the be B though after excruciating suffering it may seem to wither, the soul never dies, C. excruciating, interminable suffering that goes on for half a century can kill the soul.

this is me and I am proud of my 15 year old self

Answers

Answer:

good

Step-by-step explanation:

thx for the points :)

Help! Will mark brainliest

Answers

Answer:

x < −4

Step-by-step explanation:

hope this helps u with ur question lol

Work out ( 6x10^2) divide by (3x10^-5)
Give your answer in standard form.

Answers

2•10^7 that’s the answer hope it helps

Help please I will give you the brainliest

Answers

Answer:

65 degrees becue it is equal shape so it would be the same.

65 degreese

Step-by-step explanation:

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