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Savatey [412]
3 years ago
14

NEED HELP ASAP!!!!!!

Mathematics
2 answers:
LUCKY_DIMON [66]3 years ago
7 0
Commititive property and



Distributive property
avanturin [10]3 years ago
5 0

commitative property and

distributive property

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Solve the inequality ||x-4|-2|<3
Shkiper50 [21]

Answer: Solve the inequality:

||x-4|-2|<3

Step-by-step explanation:Solve the inequality ||x-4|-2|<3

4 0
3 years ago
A test is used to assess readiness for college. In a recent​ year, the mean test score was 20.3 and the standard deviation was 4
Vlada [557]

Answer:

\mu = 20.3

\sigma = 4.9

And we can find the limits in order to consider values as significantly low and high like this:

Low\leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5

High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

For this case we can consider a value to be significantly low if we have that the z  score is lower or equal to - 2 and we can consider a value to be significantly high if its z score is  higher tor equal to 2.

For this case we have the mean and the deviation given:

\mu = 20.3

\sigma = 4.9

And we can find the limits in order to consider values as significantly low and high like this:

Low \leq \mu -2 \sigma= 20.3- 2*4.9 = 10.5

High\geq \mu +2 \sigma= 20.3+ 2*4.9 = 30.1

6 0
3 years ago
Solve x2-x-5/2 = 0 using the quadratic formula.<br><br> the answer choices are in the picture
allsm [11]

Answer:

Exact Form:  x =( 1 ± √ 11) /2

It's the first one.

Step-by-step explanation:

Solve the equation for  x  by finding  a ,  b , and  c  of the quadratic then applying the quadratic formula.

7 0
3 years ago
What is the general term equation, an, for the arithmetic sequence 9, 5, 1, −3, . . . , and what is the 21st term of this sequen
marin [14]
Hello : 
<span>the general term equation, an, for the arithmetic sequence is : 
An = A1+d(n-1)
A1 : the first term   and : d the common diference
in this exercice : 
A1 = 9
d =(-3)-(1) =(1)-(5) =(5) -(9) = -4
An = 9-4(n-1)
An = -4n +13</span>
4 0
3 years ago
Please help me with this
dusya [7]
The numbers below are cut off. Can you please add another picture
7 0
2 years ago
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