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I am Lyosha [343]
3 years ago
10

in yoga class, all of the students are lined up according to height. Andy notices that the number of students who are taller tha

n he is one-fourth the number of students who are shorter than he. Violetta notices that there are 3 times as many students who are taller than she than students who are shorter than she. How many students are the class is there are fewer than 40 students?
Mathematics
1 answer:
vlada-n [284]3 years ago
4 0

Answer: i think its 21! how idfk but it was on some website...dont hatecrime me!

Step-by-step explanation:

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Please help I’m stuck.
madam [21]
Well the slope is -3 and I'm assuming that the y-intercept is 250 because that's where it touches it at all on the graph

Hope this helps. If it does, please rate it as Brainliest
3 0
3 years ago
Lena spent $39 on fruit at the grocery store. She spent a total of $60 at the store. What percentage of the total did she spend
Likurg_2 [28]

Answer:

The answer is 65%

Step-by-step explanation: Divide 60 by 39 and multiply by 100. So it will look like 39/60=0.65*100=65%. I hope this helps. :)

7 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
3 years ago
How to put 1760 into a fraction
Nikolay [14]
Is there a decimal, if so i can answer.
7 0
3 years ago
Read 2 more answers
How do i solve 6x=5x+7 by using solving systems by elimination?
klio [65]
I just learned about it. Simple!

6x=5x+7
Subtract 5x from both sides.
-5x -5x
You end up with
1x=7   or  x=7



7 0
3 years ago
Read 2 more answers
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