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ziro4ka [17]
3 years ago
12

What is the value of 3x^2+5x+25 when x=3

Mathematics
1 answer:
andrew-mc [135]3 years ago
5 0

Answer:

67

Step-by-step explanation:

PEMDAS

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You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con
Naddika [18.5K]

Answer:

The sample size is    n = 68

Step-by-step explanation:

From the question we are told that

    The margin of error is  E = 5 \ years

     The standard deviation is  \sigma = 22

From the question we are told the confidence level is  94% , hence the level of significance is    

      \alpha = (100 - 94 ) \%

=>   \alpha = 0.06

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

   Z_{\frac{\alpha }{2} } =  1.881

Generally the sample size is mathematically represented as  

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

=>  n = [\frac{1.881 } *  22 }{5} ] ^2

=>  n = 68

8 0
3 years ago
Glen received $2,250 loan from bank. After six months, he paid back $2,295 and closed the loan. Find the rate of interest
kumpel [21]

Answer: 6.824%

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8 0
3 years ago
The length of a pencil is 128 mm correct to the nearest
Cloud [144]
128 mm is the corrrect but not corre I by score u should.
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2 years ago
Describe the rays of an angle that measures 1/2 turn?
mel-nik [20]
<span>180 degrese or some thing flat</span>
8 0
3 years ago
Simplify y^-2/y^-7. Write your answer with a positive exponent only.
attashe74 [19]

Answer:

y^5

Step-by-step explanation:

y^-2/y^-7

When we divide exponents with the same base, we subtract the exponents

y^ ( -2 - -7)

y^ ( -2+7)

y^ 5

4 0
3 years ago
Read 2 more answers
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