1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
WARRIOR [948]
2 years ago
13

3. Si al doble de un número se le resta su mitad resulta 30. ¿Cuál es el número? Plantear ecuación y resolverla

Mathematics
1 answer:
guajiro [1.7K]2 years ago
8 0

Respuesta:

2x - 0.5x = 30

x = 20

Explicación paso a paso:

Llamemos "x" a la incógnita, el número desconocido.

Cuando nos referimos al doble de un número, es lo mismo que 2x.

Cuando nos referimos a la mitad de un número, es lo mismo que 0.5 x.

Consideremos que al doble de un número (2x) se le resta su mitad 0.5x) y se obtiene 30. La ecuación resultante es:

2x - 0.5x = 30

1.5x = 30

x = 30/1.5 = 20

You might be interested in
MAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Natali [406]
I believe it is neither

For one if you plug in either of them the first one is going to be negative 3. But if you use the second one then your answer would be -3+12= -10 but -3+12 is 9 so I would go with neither because I don't see how it's both
4 0
3 years ago
Select the correct answer.
Katena32 [7]

Answer:

I think No B

if wrong correct me pls

have a great day

3 0
2 years ago
PLS, I NEED HELP DUE IN 3 HOURS! 25 POINTS
Bad White [126]

Answer:

B

Step-by-step explanation:

y = 6x + 3 Step-by-step explanation:Givenx = {5, 6, 7, 8, 9}

7 0
2 years ago
Change to a fraction 3.025
scoray [572]

Answer:

3.025 as a fraction is 121/40

3 0
3 years ago
Write this trinomial in factored form 2a^2 +7a+3
EleoNora [17]

Answer:

(2a + 1)(a + 3) = 2a² + 7a + 3

8 0
3 years ago
Other questions:
  • For the fiction f(x)=x^2+3x-28 solve the following f(x) = 0
    8·1 answer
  • 256 divided by 11 equals what
    15·1 answer
  • Which statements are true about a triangular pyramid? Check all that apply. It has exactly two faces that are triangles. It has
    9·2 answers
  • Lisa has 12 more stickers than John, and together they have 60 stickers. What is the ratio of the number of Lisa’s stickers to t
    9·2 answers
  • Help Plsssss middle school math
    6·2 answers
  • There are 11 books on a shelf. 6 of these books are new. The rest are used. What is the ratio of NEW books to USED books? (hint:
    14·1 answer
  • Need help with 17 and 18
    6·1 answer
  • Have you ever seen 2 pretty best friends?
    7·2 answers
  • $36,716×4.5%×6 years =
    5·1 answer
  • Identify all the computer software that you need for the following entrepreneurial activities. Refer your answer from the items
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!