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Reptile [31]
3 years ago
8

What does it mean to multiply

Mathematics
2 answers:
makkiz [27]3 years ago
6 0
Repeated addition but more easier and faster to write. And also what she said ^
jek_recluse [69]3 years ago
4 0
2x2=4 so if you multiply a number times another one it will add up to a greater number
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i need help asap!! Which number below is an irrational number? 4.5679325... 3.25 none of the above
lisov135 [29]

i looked up IN means and it said cannot be describes as a simple fraction

or 4.56 etc is your answer

brainliest?

4 0
3 years ago
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A sample size must be determined for estimating a population mean given that the confidence level is ​% and the desired margin o
Sauron [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

a

 n =290

b

 n =129

c

 The correct option is  D

Step-by-step explanation:

From the question we are told that

    The margin of error is   E  =  0.23

     The largest value is  k =  15

     The smallest value is  u = 7

From the question we are told the confidence level is  95% , hence the level of significance is    

      \alpha = (100 - 95 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.96

Generally population  standard deviation estimate is mathematically represented as

      \sigma  =  \frac{Range }{4}

Here the Range is mathematically represented as

       Range  =  k - u

=>    Range  = 15 - 7

=>    Range  = 8

=>   \sigma  =  \frac{8 }{4}

=>   \sigma  =  2

Generally the sample size is mathematically represented as

n = [\frac{Z_{\frac{\alpha }{2} } *  \sigma }{E} ] ^2

=>   n = [1.96  *  2 }{0.23} ] ^2

=>   n =290

Generally to obtain a  conservatively small sample size the population standard deviation estimate becomes

=>   \sigma  =  \frac{Range }{6}

=>   \sigma  =  \frac{8 }{6}

=>   \sigma  =1.333

Generally the conservatively small sample size is mathematically evaluated as

n = [\frac{Z_{\frac{\alpha }{2} } *  \sigma }{E} ] ^2

=>   n = [1.96  *  1.333 }{0.23} ] ^2

=>   n =129  

 

6 0
3 years ago
Please help will mark brainliest
ExtremeBDS [4]

Answer:

A

Step-by-step explanation:

4 0
3 years ago
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Some ppl might think this is easy
ratelena [41]
Point-slope form: y - 5 = (-1/5)(x - 7)

standard form: x + 5y = 7

slope-intercept form: y = (-1/5)x + (7/5)
***note: (-1/5) = -0.2 and (7/5) = 1.4
8 0
3 years ago
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When lines intersect in one place, what are they called?
Deffense [45]
Independent
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7 0
3 years ago
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