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murzikaleks [220]
3 years ago
13

If x=3 can 3x - 5 = 4x - 9 be right

Mathematics
1 answer:
gtnhenbr [62]3 years ago
7 0

Answer:

No. 3x is the same as 9-5, which equals 4 and 4x is equal to 12 and 12-9=3

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HELP PLEASE!!! Evaluate the expression 12 + {-4 + 2[1 + 3(-5 – 3)]} and enter your answer.
Afina-wow [57]
Answer: -42
explanation: you start with the innermost parentheses and work out
8 0
4 years ago
sally works in a factory that produces 1,000 televisions each day. when 40 televisions were sampled, it was found that 6 were de
Lostsunrise [7]

An estimate of the number of defective televisions that are made each day is 150.

<h3>How many defective televisions are made each day?</h3>

The first step is to determine the ratio of the televisions sampled to the total number of televisions produced each day.

1000 / 40 = 25

The second step is to multiply, 25 by 6: 25 x 6 = 150

To learn more about multiplication, please check: brainly.com/question/13814687

#SPJ1

8 0
2 years ago
Considere a função de oferta como sendo y= 5x - 1/2 e a função de demanda como sendo y= -7x + 47/2 , onde x é a quantidade e y é
swat32

A) Temos que igualar isso a 2,50, que é o valor de y, ou seja, o valor do preço. Façamos isso, então, na função de demanda.

y = -7x + \frac{47}{2}

Substituir.

2,50 = - 7x + \frac{47}{2}

Passar o que é x de um lado e o que é número do outro lado.

-7x  = - \frac{47}{2} + 2,50

A fração 47/2 corresponde a 23,5. É mais interessante para nós, nesse caso, utilizar o valor decimal.

-7x  = - 23,5 + 2,50

Somar logo.

-7x = -21

Podemos multiplicar por -1 para tirar os sinais negativos.

7x = 21

Passar o x dividindo

x = \frac{21}{7}

Dividir

\boxed{x = 3}

Para um preço de R$ 2,50, a quantidade demandada é de 3 unidades.



B) Basta igualar as duas formulinhas.

5x - \frac{1}{2} = -7x + \frac{47}{2}

Passar o que é x de um lado e o que é número do outro lado.

5x + 7x = \frac{47}{2} + \frac{1}{2}

Somar tudo. Como as frações têm o mesmo denominador, <u>nada de </u><u>mmc</u>! Basta somar os numeradores.

12x = \frac{48}{2}

Podemos dividir lá, olha:

12x = 24

Passar o x dividindo

x = \frac{24}{12}

Dividir

\boxed{x = 2}

O ponto de equilíbrio é o valor 2.



C) Basta, então, igualar as fórmulas da oferta e da demanda a 10.

Fórmula da oferta

10 = 5x - \frac{1}{2}

Passar o que é x de um lado e o que é número do outro lado.

5x = 10 - \frac{1}{2}

Se 1/2 = 0,5, dá pra resolver sem fazer mmc:

5x = 10 - 0,5

Subtrair

5x = 9,5

Passar dividindo

x = \frac{9,5}{5}

Dividir.

\boxed{x = 1,9}

Fórmula da demanda

10 = -7x + \frac{47}{2}

Passar o que é x de um lado e o que é número do outro lado.

-7x = \frac{47}{2} - 10

Divide 47/2, vai.

-7x = 23,5 - 10

Subtrair.

-7x = 13,5

Passar o 7 dividindo.

x = - \frac{13,5}{7}

Vamos dividir e transformar em decimal.

\boxed{x = -1,9285714285714285714285714285714}


Subtrair a oferta pela demanda.

x = 1,9 - (-1,9285714285714285714285714285714)

Subtrair.

\boxed{x = 3,8285714285714285714285714285714}

Arredondando, o preço será de R$ 3,83.

8 0
3 years ago
Kiana is staying on the 5th floor of a hotel. She rode an elevator down 7 floors from her room to the parking garage to get her
Serggg [28]

Answer:

the 2nd and 4th expressions are the appropriate ones.  

Step-by-step explanation:

both result in '0' which means that kiana is on the ground floor of the building at the end.

4 0
3 years ago
Read 2 more answers
Mount everest is 8847 m high. how many centimeters high is the mountain
nata0808 [166]
Before we answer the question we must first:
1. Assess what we have so far.
2. Know what we need to find.
3. Solve.
4. Conclude.

Step 1: What we have so far.
*Mt. Everest's height in meters (m) =  <span>8847m

Step 2: What we need to find.
*</span>Mt. Everest's height in centimeters (cm) = ?

Step 3: Solve.
*Centi means 100.
*1m = 100cm

Conversion process:
8847m x 100cm/1m <--- we need to multiply Mt. Everest's height to 100cm/1m first because our first agenda is to remove (m) from the value.
8847 x 100cm <--- this will be our working solution.
884,700cm <--- Answer

Step 4: Conclusion.
After successfully doing the steps above, we can now conclude that the height of Mt. Everest in centimeters is: 884,700cm
6 0
3 years ago
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