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jeka57 [31]
3 years ago
11

Julias text messaging plan costs $8 for the first 400 messages and 20e for each additional text message. If she owes $24.00 for

text messaging in the month of
September, how many text messages did she send that month?
Mathematics
1 answer:
Makovka662 [10]3 years ago
4 0

Answer:

160 is the answer because 8x20 is 160 also 20÷400 is 20 so that made pretty good sense

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According to the manufacturer of the candy Skittles, 20% of the candy produced are red. If we take a random sample of 100 bags o
WITCHER [35]

Answer:

0.15651

Step-by-step explanation:

This can be approximated using a Poisson distribution formula.

The Poisson distribution formula is given by

P(X = x) = (e^-λ)(λˣ)/x!

P(X ≤ x) = Σ (e^-λ)(λˣ)/x! (Summation From 0 to x)

where λ = mean of distribution = 20 red bags of skittles (20% of 100 bags of skittles means 20 red bags of skittles)

x = variable whose probability is required = less than 16 red bags of skittles

P(X < x) = Σ (e^-λ)(λˣ)/x! (Summation From 0 to (x-1))

P(X < 16) = Σ (e^-λ)(λˣ)/x! (Summation From x=0 to x=15)

P(X < 16) = P(X=0) + P(X=1) + P(X=2) +......+ P(X=15)

Solving this,

P(X < 16) = 0.15651

4 0
3 years ago
Is the given function exponential function?<br> 3x2 - 4x + 7 = 0 Yes or No? How do you know?
yawa3891 [41]

Answer: no

Step-by-step explanation:

because you can do what is known as the vertical line test to determine if it is a function you do that by plotting it and if it goes in a vertical line then it is a function

7 0
3 years ago
I think of a number multiply it by 2, subtract 5 and multiply the result by 2
zalisa [80]
Call our original number n. Then here's what we did in an equation:
(n*2-5)*2=2

We can solve this for n:
n*2-5=1
n*2=6
n=3
7 0
3 years ago
.872 to scientific notation
Crazy boy [7]

Answer:

8.72×10²

Step-by-step explanation:

  1. 8.72×10²=872
3 0
2 years ago
I don’t get the kind of math that’s called averages
nignag [31]

Answer:

it's known as statistics

mean - The mean is what most people mean when they say 'average'. ...

mode - The mode is the number in a set of numbers which occurs the most. ...

median - The median of a group of numbers is the number in the middle, when the numbers are in order of magnitude.

Step-by-step explanation:

8 0
2 years ago
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