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w=?

Answer:

The sister is 25.5. The brother is 28.5.

Step-by-step explanation:

25.5 + 28.5 = 54.

The boy's age is 9.

The girl's age is 12.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Boy's age = x

Girl's age:

y = x + 3

Now,

x (x + 3) = 54

x² + 3x - 54 = 0

x² + (9 - 6) - 54 = 0

x² + 9x - 6x - 54 = 0

x(x + 9) - 6(x + 9) = 0

x - 6 = 0

x = 6

x + 9 = 0

x = -9 ( cannot be negative)

Now,

x = 9

Boy's age = 9

Girl's age = 9 + 3 = 12

Thus,

The boy's age and the girl's ages are 9 and 12.

Learn more about expressions here:

https://brainly.com/question/3118662

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Answer:

A

Step-by-step explanation:

[tex]\frac{3}{11} = 0.2727272727[/tex]

27 is repeating so you draw a line over the number

Answer: 0.27 thats the answer hope you pass your grade

Answer:

it's c because it's the missing value

Answer:

35/26 = 1.346153846

Step-by-step explanation:

6(3+2)

Step-by-step explanation:

that xas factor of 18+12

Answer:

30:)

Step-by-step explanation:

I think it's 30!!!!!

Answer:

I believe the answer is D

Step-by-step explanation:

I believe it is D because the author does restate the thesis and has powerful reasoning

Answer:

21x+−6

work:

Combine Like Terms:

=8x+3x+10x+−6

=(8x+3x+10x)+(−6)

=21x+−6

Answer:

21x-6

Step-by-step explanation:

8x+3x+10x-6

8x+3x=11x+10x+21x

21x-6

you can only combine like terms

Lets us start with finding the inner angles of the triangle. The bottom right angle shall be 70 degrees as it is opposite. The 100 degrees shall add together to make 200. 360-200 = 160. 160 / 2 = 80. So, Now we know bottom left angle (80) and bottom right (70). 80 + 70 = 150. In a triangle, angles add to 180 so 180 - 150 = 30. 30 = 2x which means that x = 15

15

Answer:

you 3.15+5 es igual a 8 .15

Step-by-step explanation:

espero que te sirva

Answer:

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

Step-by-step explanation:

Fraction of the floats that belongs to sports team = [tex]\frac{6}{18}[/tex]

                                                                                  = [tex]\frac{1}{3}[/tex]

Therefore, fraction of floats that were not from a sports team = 1 - fraction of floats that belongs to sports team

= 1 - [tex]\frac{1}{3}[/tex]

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

[tex]\frac{2}{3}[/tex]rd fraction of Parade Float were not from a sports team.

Answer: x^2-5x+1

Step-by-step explanation:

A P E X

Answer:

[tex]d = 39[/tex]

Step-by-step explanation:

1) Multiply both sides by d.

[tex] \frac{20}{13} d = 60[/tex]

2) Simplify 20/13d to 20d/13.

[tex] \frac{20d}{13} = 60[/tex]

3) Multiply both sides by 13.

[tex]20d = 60 \times 13[/tex]

4) Simplify 60 × 13 to 780.

[tex]20d = 780[/tex]

5) Divide both sides by 20.

[tex]d = \frac{780}{20} [/tex]

6) Simplify 780/20 to 39.

[tex]d = 39[/tex]

Therefor, the answer is d = 39.

Answer:

The answer is 68

Step-by-step explanation:

You can find it by seeing 4x-20+x=90 because of the vertical angles and how you can see that it equivalates to 90 degrees.

Answer:

61/60

Step-by-step explanation:

answer:

61 / 60

step-by-step explanation:

5 / 12 + 3 / 5

= 25 / 60 + 36 / 60

= 61 / 60

Answer:

the scale factor is penguin

jkjk the scale factor is 1/2

Step-by-step explanation:

to find the scale factor you take the coordinates of the image and divide it by the coordinates of the preimage

ex. A' coordinates are (3,1)

A coordinates are (6,2)

3/6=1/2

1/2=1/2

therefore the scale factor is 1/2

hope this helps :)

Answer:

.5

Step-by-step explanation:

(.25)(1)(2)=.5 or just 1/2

Answer:

[tex]m=\frac{2}{5}[/tex]

Step-by-step explanation:

1. To find the slope we need to use the slope formula, [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

2. The points that were given were (0,0) and (5,2). Let's plug those into the formula.

[tex]\frac{2-0}{5-0}[/tex]

[tex]\frac{2}{5}[/tex]

So, your slope would be [tex]m=\frac{2}{5}[/tex]

Hope this helped! C:

Answer:

B. 86 cm long

It is this because it is, don't even try and bring me down bro

Add the rational expression

[tex] \sf \large{ \frac{3}{6x {}^{3} } + \frac{4x}{2x}}[/tex]

[tex] \sf \large{ \frac{1}{2x {}^{3} } + 2}[/tex]

[tex]\sf \large \purple{ = \frac{4x {}^{3} + 1 }{2x {}^{3} }}[/tex]

Answer:

0.343

Step by step explanation:

 0. 3 4 3

8    2. 7 5 0

− 0      

 2 7    

− 2 4    

   3 5  

 − 3 2  

     3 0

   − 2 4

       6

Answer:

675 mm²

Step-by-step explanation:

base = 15 x 15  = 225 mm²

4 sides = 4(15)(15)(0.5) = 450 mm²

450 + 225 = 675 mm²

Answer:

45

Step-by-step explanation:

63=7x9

36=4x9

? =5x9

therefore the answer is 45

Answer:

50?

Step-by-step explanation:

31: 62*100 =

(31*100): 62 =

3100: 62 = 50

Answer:

[tex]\sqrt{2}[/tex]

Step-by-step explanation:

Both legs are equal, which implies the triangle is a 45-45-90.

The hypotenuse of this triangle is: [tex]\sqrt{2}[/tex]

Answer:

2.57-0.4-0.4-0.4=1.37

2.57-0.4-0.4=1.77

so the answer is 1.37 between 3.77

Step-by-step explanation: