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xeze [42]
2 years ago
5

Hey hey hey hey hey hey​

Mathematics
2 answers:
Kitty [74]2 years ago
5 0

Answer:

YES HOW ARE U

Step-by-step explanation:

VladimirAG [237]2 years ago
3 0

Answer:

hey hey hey hey hey heyhey

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Celine works twice as many hours as she spends in class she studies 4 hours for every hour in class to maintain her health and s
natita [175]

Answer:

she will spend 10 hours in class 40 hours studying and 20 hours working

Step-by-step explanation:

if u simply start at 1 hour of class u get to see the pattern example:

class. study. work

1 4. 2

she works twice as long as she is in class and studies 4 times longer than in class so for every hour she is in class do the math for this condition. for every class hour multiply by 4 to get her study time and then multiply her class hour by 2 to get her work hours. keep going until the total time of all activities adds to 70

4 0
3 years ago
Which function is equivalent to y=3(x+2)^2+7
Ilia_Sergeevich [38]
3x+45 most u can simplify it
8 0
3 years ago
Help me with this question pleaseeee :3
slamgirl [31]

Answer:

Step-by-step explanation:

<h2>first, you have to multipy by 6 then add 13. </h2>
5 0
3 years ago
Read 2 more answers
Solve for x: −3|x − 3| = −6
lozanna [386]
-3|x-3|=-6
divide both sides by -3
|x-3|=2
assume
x-3=2 and
x-3=-2

x-3=2
add 3
x=5

x-3=-2
add 3
x=1

x=5 or 1
7 0
3 years ago
A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys
Luba_88 [7]

Answer:

z=-1.28

And if we solve for a we got

a=470 -1.28*60=393.2

So the value of height that separates the bottom 10% (Fastest 10%) of data from the top 90% is 393.2.

so if the time is 393.2 or lower a boy would earn a certificate of recognition from the fitness association

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".  

Solution to the problem

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

X \sim N(470,60)  

Where \mu=470 and \sigma=60

NOTE: For this case the fastest 10% is on the lower tail of the distribution

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.9   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.1 of the area on the left and 0.9 of the area on the right it's z=-1.28. On this case P(Z<-1.28)=0.1 and P(z>-1.28)=0.9

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-1.28

And if we solve for a we got

a=470 -1.28*60=393.2

So the value of height that separates the bottom 10% (Fastest 10%) of data from the top 90% is 393.2.

so if the time is 393.2 or lower a boy would  earn a certificate of recognition from the fitness association

4 0
3 years ago
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