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elena-14-01-66 [18.8K]
2 years ago
7

Solye for x. 8(x + 1) - 3[X + 4) = 7(2 - x)

Mathematics
1 answer:
kramer2 years ago
4 0

Answer:

3/2

Step-by-step explanation:

distribute 8,-3,7

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Tatiana [17]
The answer is 30 yahhhhhhhhhhh
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2 years ago
The Sky Ranch is a supplier of aircraft parts. Included in stock are 10 altimeters that are correctly calibrated and two that ar
mart [117]

Answer:  a) 0.545,b) 0.41, c) 0.045, d) not possible.

Step-by-step explanation:

The Sky Ranch is a supplier of aircraft parts. Included in stock are 10 altimeters that are correctly calibrated and two that are not. Three altimeters are randomly selected without replacement. Let the random variable

x represent the number that are not correctly calibrated.

Complete the probability distribution table.

x={0,1,2,3}

P(x=0)=?

P(x=1)=?

P(x=2)=?

P(x=3)=?

Since we have given that

n = 12

number of good one = 3 from 10

number of bad one = 2

So, P(X=0)=\dfrac{^{10}C_3\times ^2C_0}{^{12}C_3}=\dfrac{120}{220}=0.545

P(X=1) = \dfrac{^{10}C_2\times ^2C_1}{^{12}C_3}=\dfrac{90}{220}=0.41

P(X=2)=\dfrac{^{10}C_1\times ^2C_2}{^{12}C_3}=\dfrac{10}{220}=0.045

P(X=3) is not possible.

Hence, a) 0.545,b) 0.41, c) 0.045, d) not possible.

5 0
3 years ago
Divide 103.2 tonnes in the ratio 5:3​
sesenic [268]

Answer:

\frac{64.5}{38.7}: \frac{5}{3}

Step-by-step explanation:

5 : 3

5 + 3 = 8

103.2 ÷ 8

12.9

12.9 × 3

38.7

12.9 × 5

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2 years ago
Steps to solve 4.3x+19.35=8.11+4.0x
dimulka [17.4K]

Answer:

  x = -37 7/15

Step-by-step explanation:

1. Find the terms with the variable. They are 4.3x on the left and 4.0x on the right.

2. Identify the term with the least coefficient*. It is 4.0x on the right.

3. Subtract that term from both sides of the equation.

  4.3x -4.0x +19.35 = 8.11 +4.0x -4.0x

  0.3x +19.35 = 8.11 . . . . . . simplify

4. Identify any constant term on the side of the equation with the variable. It is 19.35 on the left.

5. Subtract that constant from both sides of the equation.

  0.3x +19.35 -19.35 = 8.11 -19.35

  0.3x = -11.24 . . . . . . . simplify

6. Divide both sides of the equation by the coefficient of the variable. That coefficient is 0.3 in this equation.

  (0.3x)/0.3 = (-11.24)/0.3

  x = -37.466666... (repeating decimal)

__

If you like, you can express the solution as a mixed number:

  x = -11.24/0.30 = -1124/30 = -562/15

  x = -37 7/15

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You are expected to be able to do the math using the numbers in any form they might appear: integers, mixed numbers, fractions, decimals, scientific notation. You can convert the problem here to an integer problem by multiplying both sides by 100:

  430x +1935 = 811 +400x

The answer still has a fraction in it: x= -1124/30 = -37 7/15.

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* You subtract the term with the least coefficient so the variable term in the result has a positive coefficient. That may be desirable, but is not necessary. You can subtract either variable term to get the variable on one side of the equal sign. You have to pay attention to the resulting sign when you divide by the variable's coefficient.

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3 years ago
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what's your question?

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