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nalin [4]
3 years ago
5

Help someone please

Mathematics
1 answer:
leva [86]3 years ago
4 0
21.19%

First you need to find the z-score with

X- Mean
-----------       =  Zscore
Standard
Deviation

Then use your z table (should be on your formula sheet if not look one up) 
to find your proportion (in this problem it would be .2119)  and convert it to a percent.

So plug everything in 

6.64-7.2
------------ = Z-Score
     .7

Z-Score= 0.8

The table showed our proportion to be .2119

therefore your percent is 21.19%
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If the exponential parent function,
laila [671]

Answer: f(x) =3^{-x}-4

Step-by-step explanation:

Some transformations for a function f(x) are shown below:

If f(x)+k, the function is translated up "k" units.

If f(x)-k, the function is translated down "k" units.

If -f(x), the function is reflected across the x-axis.

If f(-x), the function is reflected across the y-axis.

Therefore, knowing those transformations and given the exponential parent function:

f(x) = 3^x

If it is reflected across the y-axis and the it is  translated down 4 units, we can determine that the resulting function is:

f(x) =3^{-x}-4

6 0
3 years ago
Five-sixths of the thirty students passed their test. How many student did not pass
vlada-n [284]

Answer:

5 as 5/6 of 30= 25 and 25+5 =30

Step-by-step explanation:

5 0
3 years ago
Which symbol correctly compares the two angle measures? pi/4 radians_____30°
Thepotemich [5.8K]

Answer:

B. \frac{\pi }{4} Rad>30^{0}

Step-by-step explanation:

\frac{\pi }{4} Rad=(180/4)^{0} =45^{0}

Hope this helps

6 0
3 years ago
You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40.
koban [17]

You buy 3 shirts and 1 pair of pants for $32. Your friend buys 2 shirts and 3 pairs of pants for $40. How much did each item cost?

 

First let’s define a shirt as X and pants as Y!

 

In the first scenario, the equation will be 3X + Y =$32

In the second scenario, the equation will be 2X + 3Y = $40  

 

Now because we have two different variables (X & Y) let’s solve for one of them (Ex: Y) to simplify the equations!

 

3X + Y= $32—> subtract 3X on both sides of the equation  

-3X.        - 3X

 

Net result: Y= 32- 3X

 

Now we can insert this into the second equation 2X + 3Y = $40 in order to solve for X variable  

 

2X + 3(32-3X) = $40

2X + 96 - 9X = $40 —> simplify the equation  

-7X + 96 = $40 —> substrate 96 from both sides  

-7X = -56 —> divide both sides by -7  

X= 8  

 

Now reinsert 8= X into 3X + Y = $32

3(8) + Y = $32

24+ Y = $32 —> substract 24 from both sides

y = 8

   

ANSWER: X= 8, Y= 8

If I am wrong I am sorry >_<

5 0
3 years ago
John solves the equation 5(x-3)+4=18. which 2 choices could be his next step in solving the equation?
Natali [406]
His 2 choices are 5x-15+4=18 and 5(x-3)=14
5 0
2 years ago
Read 2 more answers
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