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AleksAgata [21]
2 years ago
13

Please help If you know the answer!!

Mathematics
1 answer:
prisoha [69]2 years ago
4 0

Answer:

-3 +8a

Step-by-step explanation:

(3-8a) *(-1)

Distribute

3*-1  -8a*-1

-3 +8a

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Ways that a person can get micronutrients from non-food sources.
cestrela7 [59]

Answer: vitamin d - you can get it from the sun

Step-by-step explanation: vitamin D is a micronutrient that you can get through food or from the sun

8 0
2 years ago
Let X denote the number of flaws along a 100-m reel of magnetic tape (an integer-valued variable). Suppose Zdenote the number of
Lemur [1.5K]

Answer:

a) P(20 \leq X \leq 30) = P(20-0.5 \leq X \leq 30+0.5)

P(19.5 \leq X \leq 30.5) = P(\frac{19.5-25}{5} \leq Z \leq \frac{30.5 -25}{5})=P(-1.1 \leq Z \leq 1.1)

And we can find this probability like this:

P(-1.1 \leq Z \leq 1.1)= P(Z\leq 1.1) -P(Z\leq -1.1) = 0.864-0.136= 0.728

b) P(X \leq 30)= P(X

And using the z score we got:

P(X

c) P(X

And if we use the continuity correction we got:

P(X

Step-by-step explanation:

Previous concepts

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".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Continuity correction means that we need to add and subtract 0.5 before standardizing the value specified.

Part a

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

X \sim N(25,5)  

Where \mu=25 and \sigma=5

Part a

For this case we want to find this probability:

P(20 \leq X \leq 30) = P(20-0.5 \leq X \leq 30+0.5)

And if we use the z score given by:

z =\frac{x-\mu}{\sigma}

We got this:

P(19.5 \leq X \leq 30.5) = P(\frac{19.5-25}{5} \leq Z \leq \frac{30.5 -25}{5})=P(-1.1 \leq Z \leq 1.1)

And we can find this probability like this:

P(-1.1 \leq Z \leq 1.1)= P(Z\leq 1.1) -P(Z\leq -1.1) = 0.864-0.136= 0.728

Part b

For this case we want this probability:

P(X \leq 30)

And if we use the continuity correction we got:

P(X \leq 30)= P(X

And using the z score we got:

P(X

Part c

For this case we want this probability:

P(X

And if we use the continuity correction we got:

P(X

3 0
3 years ago
Which operation should be performed first according to the order of operations? 3(4)^2/4+16-9
skad [1K]
PEMDAS
Parenthesis
Exponent
Multiplication
Division
Addition
Subtraction

ask yourself which one of these comes first in the given equation

hint: its the exponent 
5 0
2 years ago
A recipe calls for cup of broth. The largest volume-measuring tool that Tabitha has is a teaspoon. She knows that there are 16 t
Artist 52 [7]
1c = 16t = x(\frac{1}{3})
1c = 16t = 16 X 3
1c = 16t = 48

She should use 48 teaspoons of broth. 
5 0
3 years ago
Read 2 more answers
Find X<br> I’m kinda lazy rn<br> Thanks lol
7nadin3 [17]
X=4. 4/2=2 and 8/4=2 making the equations equal
3 0
2 years ago
Read 2 more answers
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