Given 5 + 2 = 7, Choose the related addition sentence that shows the commutative property of addition.

1 answer:

5 0

2+5 = 7 is the related addition sentence that shows the commutative property of addition because it has the same result of addition as 5+2=7.
Commutative property of addition says that if we have two numbers we have interchange them and this doesnot affect the result....

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frutty [35]

Answer:

There is a probability of 76% of not selling the package if there are actually three dead batteries in the package.

Step-by-step explanation:

With a 10-units package of batteries with 3 dead batteries, the sampling can be modeled as a binomial random variable with:

n=4 (the amount of batteries picked for the sample).
p=3/10=0.3 (the proportion of dead batteries).
k≥1 (the amount of dead batteries in the sample needed to not sell the package).

The probability of having k dead batteries in the sample is:

$P(x=k) = \dbinom{n}{k} p^{k}q^{n-k}$

Then, the probability of having one or more dead batteries in the sample (k≥1) is:

$P(x\geq1)=1-P(x=0)\\\\\\P(x=0) = \dbinom{4}{0} p^{0}q^{4}=1*1*0.7^4=0.2401\\\\\\P(x\geq1)=1-0.2401=0.7599\approx0.76$

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3 years ago

Given f(x) 2^x -7 find the x intercepts

brilliants [131]

Be sure to include the "=" sign: f(x) = 2^x -7

To find the x-intercepts, set f(x) = 0 and solve for x: 2^x - 7 = 0,
or
2^x = 7

Take the common log of both sides: x log 2 = log 7
log 7
Solve for x: x = --------- = 2.81 (approx)
log 2

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the correct answer is D

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3 years ago

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2ND TIME REPOST

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