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Nat2105 [25]
4 years ago
7

Candidates for employment at a city fire department are required to take a written aptitude test. scores on this test are normal

ly distributed with a mean of 280 and a standard deviation of 60. a random sample of nine test scores was taken.
Mathematics
1 answer:
Gnesinka [82]4 years ago
7 0
<span>If a sample of 9 test scores is taken, there is approximately a 68% chance that the scores will be between the scores of 220 and 340, a 95% chance that they will be between 160 and 400 and a 99.7% chance the scores will be between 100 and 460.</span>
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WILL GIVE BRAINLIEST, 100 points -- can you help me answer these questions for Algebra?
frozen [14]

Answer: x=316 and y=41

Step-by-step explanation:

1.      x+y=357

2.     x-y=41

3.     x+y=357

       <u>x-y=41</u>

       x=316       y= 41

6 0
3 years ago
Read 2 more answers
Help me please I will mark you as brainlist
AVprozaik [17]
Pick A that is the one I would go with.
7 0
3 years ago
If you distribute a negative factor, should you flip the inequality symbol? And why be specific
Alchen [17]
You flip is when you mulitply the whole equation by a negative
not when you distribute a  negative
if yo had
-3(x+4)>x
you wouldn't flip the negative symbol when distributing then -3

but if you had
-3(x+4)>-x
you would eventually have to multiply by -1 to make +1x

 
because they will be differente
exaple

12>3 is true
if yo multiply negative
-12>-3 is fale
-12<-3 is true

anothe rexample with placeholders
x<x+2
mulitply -1
-x>-x-2
false
-x<-x-2
true
that is why we flop the inequality symbole
6 0
4 years ago
A tangent to a circle passes through the center of the circle<br>True<br>false<br>sometimes true​
liberstina [14]

Answer:

False.

Step-by-step explanation:

A tangent is a line that only touches exactly one point of the circle. (The outer edge) :)

8 0
3 years ago
WHich choice is equivalent to the expression below? √-125
olasank [31]

Answer:

Final simplified form is 5\sqrt{5}i

Step-by-step explanation:

We have been given an expression \sqrt{-125}

Now we need to simplify \sqrt{-125} and check which choice matches with simplified form of \sqrt{-125}.

You missed to provide the choices but still we simplify that.

\sqrt{-125}

=\sqrt{-5*5*5}

=5\sqrt{-5}

When there is negative sign inside square root then we replace that by "i" iota.

=5\sqrt{5}i

Hence final simplified form is 5\sqrt{5}i

8 0
3 years ago
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