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Diano4ka-milaya [45]
3 years ago
6

Help me pleaseeeeeeeeee

Mathematics
1 answer:
Marizza181 [45]3 years ago
3 0
The answer is False!!!
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Un boligrafo cuesta 30 ptas mas que un lapiz. Un muchacho ha comprado 8 boligrafos y 15 lapices. En total le han costado 700 pta
Firdavs [7]

Por un sistema de ecuaciones, tiene-se que:

  • Cada lapiz cuesta 20 ptas.
  • Cada boligrafo cuesta 50 ptas.

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

  • Considera-se un sistema de ecuaciones, con cada boligrafo custando x y cada lapiz custando y.
  • <u>Boligrafo cuesta 30 mas que un lapiz</u>, o sea, x = 30 + y
  • <u>8 boligrafos y 15 lapices cuesta 700</u>, o sea, 8x + 15y = 700

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

  • Aplicando el <u>primer ecuación en la segunda, </u>tiene-se el cuesto de cada lapiz:

8x + 15y = 700

8(30 + y) + 15y = 700

240 + 8y + 15y = 700

23y = 460

y = \frac{460}{23}

y = 20

Cada lapiz cuesta 20 ptas.

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

Por fin, el cuesto de cada boligrafo es dado por:

x = 30 + y = 30 + 20 = 50

Cada boligrafo cuesta 50 ptas.

Un problema similar es dado en brainly.com/question/24637096

4 0
3 years ago
I need to fill in the blank area models and the numbers I'm supposed to use are the factor and expended forms next to them pleas
Makovka662 [10]

Answer:

2. x^2  -3x

    -x      3

3. x^2   7x

   -2x       -14

Step-by-step explanation:

Im pretty sure this is right, but I am so sorry if it's not tho

5 0
3 years ago
First person with a answer is marked as the Brainliest Answer
kramer

Answer:

h(x) = x/5

Step-by-step explanation:

We want to know the value of y to satisfy the given equation. So:

6x+y=4x+11y\\\\y-11y=4x-6x\\\\-10y=-2x\\\\10y=2x\\\\y=\dfrac{2x}{10}\\\\\boxed{y=\dfrac{x}{5}}

Hence, since h(x) returns the value of y we found before:

\boxed{h(x) = \dfrac{x}{5}}

3 0
3 years ago
What is the difference of -6 - (-7 ) (subtract)
snow_tiger [21]

Answer:

-13

Step-by-step explanation:

1: -6-(-7)

2: change the sign to get rid of the parenthesis so -6+-7

3: add the numbers and you get -13 because 6+7=13

7 0
3 years ago
Factor u⁴+7u²-8
nirvana33 [79]

Answer:

(u + 1)(u - 1)(u² + 8)

Step-by-step explanation:

<u>Here is the steps:</u>

  • u⁴ + 7u² - 8 =
  • u⁴- u² + 8u²-8 =
  • u²(u² - 1) + 8(u² -1) =
  • (u² - 1) (u² +8) =
  • (u + 1)(u - 1)(u² + 8)
5 0
3 years ago
Read 2 more answers
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