3 years ago

What is the value of the expression (−2 4/5)÷(−1.4)

Mathematics

1 answer:

AysviL [449]3 years ago

3 0

Answer:

Step-by-step explanation:

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3 years ago

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A number is multiplied by 5. If 5 is added to the product, you get 10. What is the number?

maria [59]

Answer:

The unknown number is 1.

Step-by-step explanation:

You have to form an expression. So let's make the unknown number as x. Firstly, a number is multiplied by 5 :

$x \times 5$

$= 5x$

Secondly, 5 is added to product and you will get 10 :

$5x + 5 = 10$

Lastly, you have to solve :

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3 years ago

Each month, an American household generates an average of 28 pounds of newspaper for garbage or recycling. Assume the standard d

Annette [7]

a) For x = 27:

z = 27-28/2 = -0.5

For x = 31:

z = 31-38/2 = 1.5

From the normal distribution table, P(27 < x < 31) = P(-0.5 < z < 1.5) = P(z < 1.5) - P(z < -0.5) = 0.9332 - 0.3085 = 62.47%

b) For x > 30.2:

z = 30.2-28/2 = 1.1

From the normal distribution table, P(x > 30.2) = P(z > 1.1) = 1 - P(z > 1.1) = 1 - 0.8643 = 13.57%

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2 years ago