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liraira [26]
3 years ago
15

Please help, I mark brainliest

Mathematics
1 answer:
kramer3 years ago
5 0

Answer:

B

Step-by-step explanation:

Different slopes no parallel

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As an estimation we are told 5 miles is 8 km.<br>Convert 80 km to miles.​
mrs_skeptik [129]
49.70. If you’re supposed to round up, I would say 50. Hope it’s right :)
7 0
3 years ago
1 2 (–1.4m + 0.4) = m + 0.2
allsm [11]

First, you need to get rid of the parenthesis, so you need to distribute:

12(–1.4m + 0.4) = m + 0.2

-16.8m + 4.8 = m +0.2

Then subtract both sides by m:

-16.8m - m + 4.8 = m +0.2 - m

-17.8m + 4.8 = 0.2

Subtract both sides by 4.8:

-17.8m + 4.8 - 4.8 = 0.2 - 4.8

-17.8m = -4.6

Now, divide both sides by -17.8:

-17.8m/-17.8 = -4.6/-17.8

m ≈ 0.258

8 0
3 years ago
The time between telephone calls to a cable television service call center follows an exponential distribution with a mean of 1.
Ulleksa [173]

Answer:

0.52763 is the probability that the time between the next two calls will be 54 seconds or​ less.

0.19285 is the probability that the time between the next two calls will be greater than 118.5 ​seconds.

Step-by-step explanation:

We are given the following information in the question:

The time between telephone calls to a cable television service call center follows an exponential distribution with a mean of 1.2 minutes.

The distribution function can be written as:

f(x) = \lambda e^{-\lambda x}\\\text{where lambda is the parameter}\\\\\text{Mean} = \mu = \displaystyle\frac{1}{\lambda}\\\\\Rightarrow 1.2 = \frac{1}{\lambda}\\\\\lambda = 0.84 \\f(x) = 0.84 e^{0.84 x}

The probability for exponential distribution is given as:

P( x \leq a) = 1 - e^{\frac{-a}{\mu}}\\\\P(a \leq x \leq b) = e^{\frac{-a}{\mu} -\frac{-b}{\mu}}

a) P( time between the next two calls will be 54 seconds or​ less)

P( x \leq 0.9)\\= 1 - e^{\frac{\frac{-54}{60}}{1.2}} = 0.52763

0.52763 is the probability that the time between the next two calls will be 54 seconds or​ less.

b) P(time between the next two calls will be greater than 118.5 ​seconds)

p( x > \frac{118.5}{60}) = P(x > 1.975)\\\\ = 1 - P(x \leq 1.975) \\\\= 1 -1+ e^{\frac{-1.975}{1.2}}\\\\= 0.19285

0.19285 is the probability that the time between the next two calls will be greater than 118.5 ​seconds.

6 0
4 years ago
A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a
n200080 [17]

A bag has 5 red marbles, 6 blue marbles and 4 black marbles

so total no. of marbles = 5 + 6 + 4 = 15

now probability of picking a black marble = 4/15

after replacement again probability of picking black marble is 4/15

it is given that black marble is picked two times

so probability of picking black marble two times or picking , replacing , and then picking is 4/15*4/15 = 16/225

5 0
3 years ago
Read 2 more answers
What is the sum of 12 – 5i and –3 4i? –16 63i 9 – i 9 – 9i 15 – 9i
Anarel [89]

The sum of the complex number  12 – 5i and –3 + 4i is 9 - i

<h3>How to sum complex number?</h3>

The sum of 12 – 5i and –3 + 4i can be done as follows:

Therefore,

12 - 5I + (-3 + 4i)

12 - 5i - 3 + 4i

Hence,

combine like terms

12 - 3 - 5i + 4i

Finally,

9 - i

learn more on complex number: brainly.com/question/10373914

#SPJ4

6 0
2 years ago
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