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Brrunno [24]
3 years ago
7

For which real numbers x and y is it true that x + y = x+y?

Mathematics
1 answer:
Alchen [17]3 years ago
6 0
By the general application of cumulative property of addition :

x + y = y + x

For sure
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Janai goes to dinner and the bill comes to $50.00. She has a coupon for 10% off. Tax is 8%. What is her total bill?
kogti [31]

Answer:

$48.60

Step-by-step explanation:

50(.10)=5.00 50-5=45. 45(.8)=3.60. $45.00+$3.60 = $48.60

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KengaRu [80]

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Step-by-step explanation:

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3 years ago
Lots of 40 components each are deemed unacceptable if they contain 3 or more defectives. The procedure for sampling a lot is to
MrRissso [65]

Answer:

The probability of founding exactly one defective item in the sample is P=0.275.

The mean and variance of defective components in the sample are:

\mu=0.375\\\\\sigma^2=0.347

Step-by-step explanation:

In the case we have a lot with 3 defectives components, the proportion of defectives is:

p=3/40=0.075

a) The number of defectives components in the 5-components sample will follow a binomial distribution B(5,0.075).

The probability of having one defective in the sample is:

P(k=5)=\binom{5}{1}p^1(1-p)^4=5*0.075*0.925^4=0.275

b) The mean and variance of defective components in the sample is:

\mu=np=5*0.075=0.375\\\\\sigma^2=npq=5*0.075*0.925=0.347

The Chebyschev's inequality established:

P(|X-\mu|\geq k\sigma)\leq \frac{1}{k^2}

6 0
3 years ago
What is the surface area of a cereal box with length of 8 width of .75 and a height of 1.50
alekssr [168]
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8 0
3 years ago
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Which of the following inequali
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3<5

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3 years ago
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