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Colt1911 [192]
4 years ago
8

Use the quadratic formula to solve x²+8x+13=0.

Mathematics
1 answer:
Alborosie4 years ago
4 0

Answer:

a=1

b=8

c=13

x=Exact form:-4+\sqrt{3}, -4-\sqrt{3}

Step-by-step explanation:

yea

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An F5 tornado is classified as having mean wind speeds greater than 261 mph. In an effort to classify a recent tornado, 20 wind
mina [271]

Complete Question

An F5 tornado is classified as having mean wind speeds greater than 261 mph. In an effort to classify a recent tornado, 20 wind speed measurements were randomly selected from within the path of the tornado. Suppose the mean wind speed for this tornado really is greater than 261 mph with a sample standard Deviation 41.09 mph. Based on the data, if we fined little to no evidence against the null hypothesis that the mean wind speed is 261 mph, we have made _______________.

Answer:

P-value=0.3322

Step-by-step explanation:

From the question we are told that:

Sample size n=20

Population mean N=261  

Sample mean \=x= 265.1  

Sample standard deviation \sigma=41.09    

Generally the equation t test statistics is mathematically given by

t=\frac{\=x-\mu}{\frac{s}{\sqrt{n} } }

t=\frac{265.1-261}{\frac{41.09}{\sqrt{20} } }

t=0.446

Therefore

Pvalue from table is

P-value=0.3322

6 0
3 years ago
A ship travels 10 miles from Point A to Point B, makes a turn of 112°, and
NNADVOKAT [17]

Answer:

13

Step-by-step explanation:

because it won't 10 then 16 so I would assume 13

3 0
3 years ago
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Answer this and ill give brainliest and help back
ratelena [41]

Answer:

6

Step-by-step explanation:

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7 0
3 years ago
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What is the slope of the line?
REY [17]

Answer:

2

Step-by-step explanation: the rise is 2 and the run is 1 and its rise over run so 2/1 and that equals 2

6 0
3 years ago
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Log25x-log5=2<br><br> Pplllleeeeeaaaassseee
Andreyy89
Since no base is stated, assume base 10
remember
loga-logb=log(a/b)
also
log_a(b)=c translates to a^c=b
and log(a^z)=zlog(a)

log25x-log5=2 means
log_{10}(25x)-log_{10}(5)=2 translates to
log_{10}( \frac{25x}{5} )=2 simplies to
log_{10}(5x)=2 translates to
10^2=5x expands to
100=5x
divide both sides by 5
20=x
4 0
3 years ago
Read 2 more answers
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