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KIM [24]
3 years ago
9

The typing speeds for the students in a typing class is normally distributed with mean 44 words per minute and standard deviatio

n 6 words per minute. What is the probability that a randomly selected student has a typing speed of less than 38 words per minute
Mathematics
1 answer:
Rasek [7]3 years ago
3 0

Answer:

15.87%

Step-by-step explanation:

*Probability-Below 15.87%

Z1=-1

*x-1 38

*µ 44

*σ 6

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Change the word phrase to an algebraic expression. Use x to represent the number.
vladimir2022 [97]

The required algebraic expression will be "7(x-5)". A complete solution is provided below.

According to the given question,

  • Let the number be "x".
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Now,

The product of the lesser number with 7 will be:

= 7(x-5) ...(Algebraic expression)

By solving this, we get

= 7x-35

Thus the above answer is appropriate.

Learn more about algebraic expression:

brainly.com/question/24021199

6 0
3 years ago
Please answer will give brainliest. Also, please check my other questions out I need help!!
polet [3.4K]

Answer: C

Step-by-step explanation:

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3 years ago
Multiply each pair of numbers -4.25x(-1.25)=
hoa [83]
The answer is 5.31245
7 0
3 years ago
If you invest $1250 in an account that earns 6% compounded quarterly, the amount you will have in the account, S(x), after x yea
kirza4 [7]

well, we know what S(x) is, since it's given, so, after , is simply a matter of x = 2,4,6,8,10, so

\begin{array}{llrll} S(2)=1250(1.015)^{4(2)}&\implies &S(2)\approx 1408.12\\ S(4)=1250(1.015)^{4(4)}&\implies &S(4)\approx 1586.23\\ S(6)=1250(1.015)^{4(6)}&\implies &S(6)\approx 1786.88\\ S(8)=1250(1.015)^{4(8)}&\implies &S(8)\approx 2012.91\\ S(10)=1250(1.015)^{4(10)}&\implies &S(10)\approx 2267.52 \end{array}

well, the tell-tale for Growth or Decay is the parenthesized term, namely the "rate of change", if it's greater than 1 is Growth, if it's less than 1 is Decay, in this case is greater than 1, is 1.015, so well, you know.

from 4 years to 10 years, how much more in interest?

well, first off let's take off the Principal of 1250 to see how much is in interest, hmmm for 4 years that'll be <u>336.23</u> and for 10 years that'll be <u>1017.52</u>, so their difference is about 681.29.

what does the S-intercept mean?  Check the picture below.

when the graph touches the y-axis or S-axis if you wish, the time is 0 and the amount is, well, you can see it there.

3 0
2 years ago
Simplify the expression: –3(5z − 9
MariettaO [177]

Answer:

-15z+27

Step-by-step explanation:

-3x5z      -3x-9

4 0
3 years ago
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