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2 years ago

Which expression is undefined? A. -8 divided by -8 B. -8 divided by 8 C. 0 divided by 8 D. 8 divided by 0

Mathematics

1 answer:

d1i1m1o1n [39]2 years ago

3 0

Answer:

I'll go with A

Step-by-step explanation:

well -8 got no divisor so yeah

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the width of a rectangle is 12 cm less than the length the perimeter is 156 cm. Find the with and length

mamaluj [8]

We know that the perimeter of a rectangle is twice the length, plus twice the width.

P = 2L + 2W

We also know that the perimeter is 156.

P = 156

Finally, we know that the width is 12 less than the length.

W = L - 12.

The next thing that we do is substitute the information that we have into the original equation:

P = 2L + 2W

156 = 2L + 2(L - 12)

From this point we start to solve

156 = 2L + 2L - 24 <---we multiplied the '2' through the parenthesis

156 + 24 = 2L + 2L - 24 + 24

180 = 2L + 2L <--- getting like terms on same sides

180 = 4L <---combining like terms

180/4 = 4L/4 <--- getting like terms on same sides

45 = L <---now we have a value for L

Now we take the known value for L and substitute it in to our equation for W

W = L - 12

W = 45 - 12

W = 33

So now we have Length = 45 and Width = 33.

6 0

2 years ago

Read 2 more answers

What expression would simplify to 9x+y+6

Montano1993 [528]

3x+3x+3x+y+3*2 ?

I only seperated the variabled number

5 0

3 years ago

Find the probability of at least 6 failures in 7 trials of a binomial experiment in which the probability of success in any one

oksano4ka [1.4K]

Answer:

$P(x \geq 6)=P(X=6)+P(X=7)$

And we can find the individual probabilities:

$P(X=6)=(7C6)(0.91)^6 (1-0.91)^{7-6}=0.358$

$P(X=7)=(7C7)(0.91)^7 (1-0.91)^{7-7}=0.517$

And replacing we got:

$P(x \geq 6)=P(X=6)+P(X=7)= 0.358+0.517=0.875$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=7, p=1-0.09=0.91)$