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3 years ago

Simplify. | -7| - | 1.2|

Mathematics

1 answer:

Sedaia [141]3 years ago

4 0

Answer:

5.8

Step-by-step explanation:

|-7|=7

|1.2|=1.2

7-1.2=5.8

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Write a quadratic function in standard form having zeros of -9 and -12

tia_tia [17]

(x + 9)(x + 12) = 0
Expanding the brackets, we get:
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3 years ago

certain computer virus can damage any file with probability 35%, independently of other files. Suppose this virus enters a folde

Ksivusya [100]

Answer:

0.623 is the probability that between 800 and 850 files get damaged.

Step-by-step explanation:

We are given the following information:

We treat virus can damage computer as a success.

P( virus can damage computer) = 35% = 0.35

The conditions for normal distribution are satisfied.

By normal approximation:

$\mu = np = 2400(0.35) = 840\\\sigma = \sqrt{np(1-p)} = \sqrt{2400(0.35)(1-0.35)} = $$23.36$

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$P(800 \leq x \leq 850) = P(\displaystyle\frac{800 - 840}{23.36} \leq z \leq \displaystyle\frac{850-840}{23.36}) = P(-1.712 \leq z \leq 0)\\\\= P(z \leq 0.428) - P(z < -1.712)\\= 0.666 - 0.043 = 0.623 = 62.3\%$

$P(800 \leq x \leq 850) = 62.3\%$

0.623 is the probability that between 800 and 850 files get damaged.

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3 years ago

Calculate the perimeter of a regular pentagon which has a side of 9cm

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The answer is 45. there are 5 sides. each one is 9cm. 9*5= 45.
hope this helps.

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Based on the information in the table, how much will Monique earn if she works 36 hours in a week?

Tresset [83]

Answer:

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Step-by-step explanation:

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Ball B, with a mass of 30kg, is moving to the left at -10 m/s. With what velocity should Ball A, with a mass of 10 kg, move to t

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4 years ago