Mathematics High School


The mean of three numbers is 8
Two of the numbers are 6 and 11
Work out the third number.​

Answers

Answer 1

Answer:

[tex]x=7[/tex]

Step-by-step explanation:

→ Form an equation

[tex]\frac{x+6+11}{3}=8[/tex]

→ Solve

[tex]x+6+11=24\\[/tex]

[tex]x=7[/tex]

Related Questions

Emily bought a pack of 5 folders for $15.30. What was the unit price?

Answers

Answer:

The unit price is $3.06

Step-by-step explanation:

Unit price is how much I unit of something costs. Therefore in order to find the unit price you just divide the total price by the number of units (in our case 5 folders). And so we get...

$15.30 / 5 = $3.06

The unit price is $3.06

Kris has 3 daughters who all live in different cities across Georgia. She wants to live somewhere that is an equal distance from each of her daughters. She mapped out the 3 cities and drew a triangle connecting them. How can she find a point on the map that is an equal distance from all 3 cities?


construct the incenter

construct the orthocenter

estimate the best place

construct the circumcenter

Answers

Answer: D) construct the circumcenter

===========================================================

Explanation:

Consider triangle ABC. The vertex points are at A,B,C. These represent the three cities in which the three different daughters live. Constructing the circumcenter will produce a circle such that all three points A,B,C are on that circle. Let's say that D is the center of that circle.

This means that AD, BD, CD are all radii of this same circle. Radii of the same circle are the same length, which is why point D is equally distant from A,B,C. If the mother lives at point D, then she will travel the same distance to visit any three of her daughters. See the note below.

To construct the circumcenter, we form perpendicular bisectors to segments AB, BC and AC. Technically you only need two of them. All three of these perpendicular bisectors intersect at point D.

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

Note: Keep in mind that roads aren't completely straight, so that means we'll have to factor in the curvature of each road. But to keep things simple, we assume each road is a straight line segment.

the algebraic expression 2x -4 when x=8 is evaluated as

Answers

Answer:

12

Step-by-step explanation:

2x-4

Subsitute x for 8 2(8)-4

Simply 16-4

12


Simplify the expression using the distributive property:
5 (2x – 3y + 4)

Answers

Apply the distributive property. 5 (2x) +5 (−3y) + 5 ⋅ 4

Multiply 2 by 5

10x + 5 ( − 3y ) + 5 ⋅ 4

Multiply  −3 by 5     10x − 15y + 5 ⋅ 4

Multiply  5 by 4

Answer: 10x −15y + 20

Tip: The sign   "⋅"  means multiply

A projectile is thrown upward so that its distance above the ground after t seconds is h=-121t^2 +504t. After how many seconds does it reach it maximum height?

Answers

Answer:

2.08secs

Step-by-step explanation:

Given the equation modeled by the height as h=-121t^2 +504t

The velocity of the object at the max height is zero, hence;

v = dh/dt = 0

dh/dt = -2(121)t + 504

dh/dt = -242t + 504

0 = -242t + 504

242t = 504

t = 504/242

t = 2.08secs

Hence the projectile reaches its maximum height after 2.08secs

Please help :)
If it's correct I might give your brainliest

Answers

$1.05 total in toppings

PLEASE HELP

4 1/3 - 2 1/4

Answers

Answer:

4 1/3 - 2 1/4 = 25/12 or 2 1/12

Step-by-step explanation:

Please help me. what is 10x10+4

Answers

104

Step-by-step explanation:

EUJDJFKFKDEISHXHJRD

Answer:

104

10 × 10 = 100

100 + 4 = 104

Therefor, the answer is 104.

I really need help,Please help:))))))

Answers

The answer is yes it increase
yes it is able to increase

In BCD, H is the centroid. If DE=51 find HE.

Answers

Answer:

[tex]HE=17[/tex] units.

Step-by-step explanation:

In a triangle, centroid is the intersecting point of the medians.

Centroid divides each of the medians in ratio [tex]2:1[/tex]

So,

[tex]\frac{DH}{HE}=\frac{2}{1} \\\\\frac{DH}{HE}+1=\frac{2}{1}+1\\\\ \frac{DH+HE}{HE} =3\\\\\frac{DE}{HE}=3[/tex]

Put [tex]DE=51[/tex] units

[tex]\frac{51}{HE}=3\\\\HE=\frac{51}{3}[/tex]

[tex]HE=17[/tex] units.

Which of the following equations, where t represents time in days, and represents length in centimeters,
could be descriptions of the growth of a bamboo plant?
Choose all answers that apply:
A
L=1.1t
B
L = 2.5t
C
L = 7.1t
D
L = 9.3t

Answers

Since its 3 through 10 centimeters per day the answers would be

C.L=3.6t
D.L=7.1t
E.L=9.3t

(I am really not sure of this)

1. (07.03 MC)
Solve -+
2 2.
5 7
- (4 points)
35
0 24
7

Answers

6.5 iiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Find mZA. The diagram is not to scale.
96°
118°
159
104°

Answers

Answer:

A=73

Step-by-step explanation:

sum of interior angles is (n-2)*180

5 sides, so (5-2)*180 = 3x180=540

sum of current interior angles (118+96+115+104)=433

subtract 540-433=107

This is NOT "A", this is your final interior measurement.

To get "A", take 180-107=73

A=73 degrees

Simplify the expression by combining like terms

34 -11c-7+2c

Answers

27-9c

Please give Brainliest !!

could you help me with this question plz

Answers

Answer:

In last year's survey, 10 people asked for a playwriting class.

Step-by-step explanation:

It supports the statement 'a playwriting class would be well attended' because it provides the proof that at least 10 people wanted a playwriting class to be hosted - this data shows a playwriting class would indeed be popular.

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Please help me out asap. I rlly need it

Answers

13.64
Pythagorus thereom

Answer:

13.64

Step-by-step explanation:

it's because it's basically the same size as 12.3 but a bit bigger. it cant be 18.2 because that would be too big and it cant be 6.4 cause its too small and so is 10.79.

Solve each equation by
20 - 2x - 11

Answers

Answer

9 - 2x

Step-by-step explanation:

since there is no equal symbol in this equation, you can only simplify it.

[tex]20-2x-11[/tex]

first combine like terms:

[tex](20-11)-2x[/tex]

then subtract 11 from 20, this will give you 20-2x-11 in its simplest form.

[tex]9 - 2x\\[/tex]

The Sumerians used rubber stamps to show ownership of objects.
True Or false

Answers

Answer:

I think False not sure

Step-by-step explanation:

the answer is false

hello. please answer this question, I WILL mark brainliest :)

Answers

Answer:

1. D) 0.113

2 C) 11

Step-by-step explanation:

1. #males that chose super strength/total males

  [tex]\frac{25}{222}[/tex]= 0.113

2. the relative frequency can be converted to a percent which is 11.3%

   given that a percent is out of 100, the expected number would be 11

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Answers

How many questions are there?

please help me on this

Answers

Answer:

de que grado eres para ayudar

The lengths of two sides of a triangle are given.
Find the range of possible lengths for the third side. 17 cm and 12 cm

Answers

Answer:

Range = 5 - 29

Step-by-step explanation:

a + b > c

a+c > b

c+b > a  

so

17+ 12 > c  ,,,,,,,,,,,,,,,,,,,,,,,,,,,, so it should be lesser than 17+12 which is 29

17 +c > 12    ,,,,,,,,,,,,,,,,,,,,,,,,, and it should be greater than 17- 12 = 5  

c+12 > 17 ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, same here,  it should be greater than 17- 12 = 5  

So the range is ,

17 + 12

to

17-12

whcih is -   (5 to 29)

I hope I am right!!!

The triangles are similar . What is the value of X

Answers

Answer:

16

Step-by-step explanation:

There are 2 different ways to solve this

1) The bigger triangle is 4 times bigger than the smaller one

5 x 4 = 20

3 x 4 = 12

From this method you can see they all connect so you take the smaller triangles value of 4 and multiply it by 4

4 x 4 = 16

2) Pythagorean theorem and reorganizing the formula so that the a value is found

[tex]a = \sqrt{c^{2} -b^{2} }[/tex]

x/2 + 7 = 12 what color​

Answers

Answer:

Red

Step-by-step explanation:

it is 10

Evaluate the function
f (x) = 1/2 x + 3
for f(4).
a.
5
b.
9
c.
11
d.
14

Answers

Answer:

a

Step-by-step explanation:

To evaluate f(4), substitute x = 4 into f(x), that is

f(4) = [tex]\frac{1}{2}[/tex] × 4 + 3 = 2 + 3 = 5

Answer is 5 so A would be correct
f(x)= 1/2 (4)+3=5

Last week, the price of apples at a grocery store was $1.60 per pound. This week, apples at the same grocery store are on sale at a 10% discount. What is the total price of 4 1/2 pounds of apples this week at the grocery store?

Answers

Answer:

6.48 dollars total,

Step-by-step explanation:

First, you would want to multiply the amount of money per pound, by the amount of pounds. 1.60 multiplied by 4 1/2 or 4.5, would equal to 7.2 dollars. In order to find 10% of 7.2, your would need to multiply 7.2 by 0.10, which would give you 0.72. Then you would subtract 7.2 by 0.72 to get 6.48. So your answer would be 6.48 dollars. Hoped this helped.

Janice used 1/3 yard of ribbon to tie a package and 1/6 yard of ribbon to tie a bow. How many yards of ribbon did Janice use? Is it 9/18? Which is 1/2? Sorry I really can't help her. I can help Sean with algebra no problem

Answers

Answer:

1/2 yard of ribbon

Step-by-step explanation:

Janice used 1/3 yard of ribbon to tie a package and 1/6 yard of ribbon to tie a bow. How many yards of ribbon did Janice use?

The number of yards that Janice used is calculated as:

1/3 yard + 1/6 yard

Lowest Common Denominator = 6

2 + 1/6

= 3/6

= 1/2 yard of ribbon

Janice used 1/2 yard of ribbon

Pls help me no explain need ❤️❤️❤️

Answers

Answer:

[tex]\displaystyle m=2[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

Reading a Cartesian planeCoordinates (x, y)Slope Formula: [tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Step-by-step explanation:

Step 1: Define

Find points from graph.

Point (-5, 0)

Point (-9, -8)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

Substitute in points [Slope Formula]:                                                            [tex]\displaystyle m=\frac{-8-0}{-9+5}[/tex][Fraction] Subtract/Add:                                                                                 [tex]\displaystyle m=\frac{-8}{-4}[/tex][Fraction] Divide:                                                                                            [tex]\displaystyle m=2[/tex]

Simplify:
4n + 6 - (5n+3)

Answers

Answer:

-n+3

Step-by-step explanation:

Subtract the 5n and 3

what's the slope (-4,15). (20,3)

Answers

Answer:

M=-1/2

Step-by-step explanation:

Answer: -1/2
Have a nice day!
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