Find the value of x plzzz

-3

Step-by-step explanation:

-2a+6=12

collect like terms

-2a=12-6

-2a=6

divide both sides hy the coefficient of a

-2a/-2 =6/-2

a= -3

Answer:

120 degrees

Step-by-step explanation:

Angles 1 and 3 are congruent, because they are vertical angles, so we must set them equal to each other, solve for x and plug in x.

Hope this helps :-)

Answer:

3 = 108 degrees

Step-by-step explanation:

2x + 80 = 3x + 60

get the variable and number on different sides

2x + 80 = 3x + 60

2x + 80 - 80 = 2x

3x + 60 - 3x = 60

2x + 3x = 5x

60 + 80 = 140

5x = 140

now divide each side by 5

5x / 5 = x

140 / 5 = 28

x = 28

28 + 80 = 108

Answer:

#2

Step-by-step explanation:

Answer:

always true

Step-by-step explanation:

Simplify, and if possible solve the equation to find out

remember, inverse operations

5x - 10 + 2x = 7 + 7x - 17

simplify both sides

7x - 10 = 7x - 10

this is an identity, no matter the value of x put in, the equation will be true,

hence the equation is always true

Answer:

9x and -4x

Step-by-step explanation:

Both 9x and -4x have the same variables? (Please correct if I am wrong..)

Answer:

ab*e/2-c+f=d

Step-by-step explanation:

d = 2.426

Answer:

1. Animals.

2. Plants.

3. Fungi

4. Protists.

5. Monerans.

6. Kingdom.

7. Botany.

8. Reproductive parts.

9. Vegetative parts.  

10. Epidermis.

Step-by-step explanation:

1. Insects, birds: Animals. All insects and birds are living organisms generally referred to as animals.

2. Moss, trees: Plants. Moss and trees are living organisms generally referred to as plants.

3. Yeast, molds: Fungi. They belong to a kingdom of multi-cellular eukaryotic organisms which can't make or produce their own food (heterotrophs).

4. Protozoa, red algae: Protists. They belong to a kingdom of single-celled (unicellular) eukaryotic microscopic organisms.

5. Bacteria, blue-green algae: Monerans. They belong to a kingdom of single-celled (unicellular) prokaryotic organisms without a nuclear cell membrane.

6. Five main groups of all living things: Kingdom. These are namely Kingdom Animalia, Kingdom Fungi, Kingdom Plantae, Kingdom Monera and Kingdom Protista

7. The study of plants: Botany.

8. Flowers, fruits, and seeds: Reproductive parts.

9. Roots, stems, and leaves: Vegetative parts.

10. Provides plant cover on leaves and roots: Epidermis.

Answer:

Step-by-step explanation:

the answer is 4 hours mark me brainliest pls

Answer:

B- 19.84

Step-by-step explanation:

Answer:

30 - 3t ≤ 20

Step-by-step explanation:

Given that :

Pool is open when high temperature is higher than 20°C

From 30°C ; temperature decreased at a constant rate in the next three days ; that is the daily fall in temperature for 3 days is the same.

Let the fall or decrease in temperature = t

Constant decrease for 3 days = 3t

Change in temperature over 3 days :

Initial temperature - constant decrease

30°C - 3t

Hence, inequality to determine rate of temperature decrease :

30 - 3t ≤ 20

The statement radioactive nuclei are highly stable and emit radiation to become unstable is FALSE.

To determine if the statement is true or false we need to know what radiactivity is

Radioactivity is the spontaneous disintegration of unstable atomic nuclei to form stable more energetic nuclei with the emission of radiation.

Radioactivity includes the following

So, radioactive nuclei which are unstable emit radiation and become more stable.

So, the statement radioactive nuclei are highly stable and emit radiation to become unstable is FALSE.

Learn more about here:

https://brainly.com/question/25756215

Answer:

3x³ + 3x² - 3

Step-by-step explanation:

Step 1: Write expression

(2x³ + 4x² + 1) + (x³ - x² - 4)

Step 2: Combine like terms

3x³ + 3x² - 3

Answer:

La cantidad de pasajeros que quedan en el avión serán [tex]\frac{1}{6}[/tex]

Step-by-step explanation:

Sabes que en el primer aeropuerto se bajan la mitad de los pasajeros, es decir que se bajan [tex]\frac{1}{2}[/tex] pasajeros, y en la segunda parada llegando a destino se bajan [tex]\frac{1}{3}[/tex] pasajeros. Entonces, la cantidad de pasajeros que se bajan en ambas paradas es la suma de la cantidad de pasajeros que se bajaron entre el primer y segundo aeropuerto:

[tex]\frac{1}{2}+\frac{1}{3}[/tex]

Lo primero que debes hacer es hayar un denominador común entre el 2 y el 3. Para eso, hallas el mínimo común múltiplo entre ambos, en este caso 6.

Luego debes multiplicar cada numerador por el número que hayas multiplicado el denominador. Para ello, dividis este mínimo común múltiplo entre el denominador inicial, y este resultado se multiplica por el numerador de esa fracción. De esta manera se obtiene:

[tex]\frac{1}{2}+\frac{1}{3}=\frac{3}{6} +\frac{2}{6}[/tex]

Finalmente se suman los numeradores y se obtiene:

[tex]\frac{1}{2}+\frac{1}{3}=\frac{5}{6}[/tex]

Considerando que 1 es un entero que representa la cantidad de total de pasajeros, para calcular la cantidad de pasajeros que quedan en el avión se realiza la sustracción:

[tex]1-\frac{5}{6}[/tex]

Resolviendo de manera similar a la suma, se obtiene:

[tex]1-\frac{5}{6}=\frac{6}{6} -\frac{5}{6}[/tex]

[tex]1-\frac{5}{6}=\frac{1}{6}[/tex]

Entonces la cantidad de pasajeros que quedan en el avión serán [tex]\frac{1}{6}[/tex]

Answer:

Hence the weight of chalk stick is 25 g.

Explanation:

Let the weight of a stick be x gm.

12% of x=3

(12/100)*x=3

x=3*(100/12)=25 g

Answer:

Step-by-step explanation:

let chalk contains 10x calcium, 3x carbon, 12x oxygen.

percentage of carbon in the chalk:

=                  3x              x 100

        10x + 3x + 12x

=  3x    ( 100 )

   25x

= 3 (4)

= 12%

Now, we know that carbon has 12% of chalk.

weight of carbon = 12% x weight of chalk. ------------- equation

plugin values into the equation:

3 = 12% (weight of chalk)

3 =   12     (weight of chalk)

      100

  12     (weight of chalk) = 3

 100

weight of chalk = 3 (100)

                               12

weight of chalk = 25g

Answer:

109.6cm^2

Step-by-step explanation:

To find the area of a trapezoid the formula is (a+b)/2*h so for this problem, (12+15.4)/2*8= 27.4/2*8= 13.7*8=109.6cm^2

Hope this helped you out! :)

Answer: 29.16

Step-by-step explanation:

1.)

324 ÷27= 12

2.)

2.43 x 12= 29.16

Answer:

P=4x+20

A=x^2+10x+21

Step-by-step explanation:

Perimeter=2(x+7)+2(x+3)

2x+14+2x+6

4x+20

Area=(x+7)(x+3)

x^2+10x+21

l = (x + 3)

b = (x + 7)

Area:

= I x b

= (x + 3)(x + 7)

= x(x + 7) + 3(x + 7)

= x² + 7x + 3x + 21

= x² + 10x + 21

Perimeter:

= 2(l + b)

= 2((x + 3) + (x + 7)) = 2(2x + 10)

= 2(x + 3 + x + 7)

= 4x + 20

Answer:

141.421356237

Answer:

In one minute 4/3 of a cup will be filled.

Step-by-step explanation:

1/4 of a minute is 60 (seconds) divided by 4 = 15

15/60 = 1/4 of a minute

1/3 of a cup in 15 seconds

1/3+1/3+1/3+1/3 = 4/3

Find the multiples of each number:

18: 1 , 2 , 3 , 6 , 9 , 18

24: 1, 2, 3, 4, 6 , 8, 12, 24

Now find the matching numbers:

1 , 2, 3 , 6

Answer:

no

Step-by-step explanation:

A proportional relationship must go through the point ( 0,0).  This does not go through the origin so this is not proportional

The relationship is linear but non proportional. The graph is a line but it does not go through the origin.

Answer:

x=[tex]\frac{19}{7}[/tex]

Step-by-step explanation:

57=x×21

57=21x

21x=57

x=[tex]\frac{19}{7}[/tex]

Answer:15

Step-by-step explanation:

Answer:

x=18

Step-by-step explanation:

Answer:

B. It is a composite number.

Step-by-step explanation:

143 can be divided by 11 and 13 making it a composite number.

The number 143 is a composite number due to having more than two factors.

The factors of the number 143 are 1, 11 and 13.

Prime number has only two factors i.e. 1 and the number itself while composite numbers can have more than two factors.

143 = 1*11*13

Since the number 143 has 3 factors i.e. 1, 11, and 13.

So, The number 143 is a composite number.

Therefore, The number 143 is a composite number due to having more than two factors.

To get more about composite numbers visit:

https://brainly.com/question/24820928

ANSWER : 0

EXPLANATION :

A(a) = 24 cm²

A(b) = 40.04 cm² ≈ 40 cm²

Hi there !

area formula (rectangle)

A = l × w

A(a) = 8cm × 3cm = 24 cm

A(b) = 5.2cm × 7.7cm = 40.04 cm² ≈ 40 cm²

Good luck !

Answer:

The answer is 3,375

Step-by-step explanation:

5 x 3=15

15 to the 3rd power is 15 x 15 x 15

15 x 15 x 15= 3,375 :)

Answer:

Explanation below

Step-by-step explanation:

(3+4)= 7

7+2 = 9

-(3-4) (Invisible one)

-3+4 add to the 9

10

10+2= 12

12-4=8

8×4 =32

Sorry if this seems a bit confusing, but its quite hard to show the process without paper.

Hope this helps! :)

Answer:

rational, integer

Step-by-step explanation: