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vlada-n [284]
3 years ago
6

What is the value of the rational expression below when xis equal to 4?

Mathematics
1 answer:
horrorfan [7]3 years ago
4 0
The answer is the letter c. 3
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scores on the act college entrance exam follow a bell-shaped distribution with mean 18 and standard deviation 6. Wayne's standar
WITCHER [35]

Answer:

His actual score is 15

Step-by-step explanation:

Here, we are interested in calculating Wayne’s actual score on the ACT

when we say the scores have being standardized, it means the score was reported in terms of the z-score and not the initial raw scores.

Now, mathematically, for the scores to have a negative z-score, it means it is actually below the mean.

The formula for the z-score or standard score is given below;

z-score = (x - mean)/SD

where in this case, x = ? which is the score we are looking for , z-score = -0.5 , mean score = 18 and standard deviation of the scores = 6

So, substituting these values into the z-score equation, we have;

-0.5 = (x-18)/6

x-18 = 6(-0.5)

x -18 = -3

x = -3 + 18

x = 15

7 0
3 years ago
What’s the rate of change of the table above? <br> A) -1/3<br> B) 1/2<br> C) -1/4<br> D) 1/5
insens350 [35]

answer is option D

because you can divide them like

\frac{2}{10}  =  \frac{1}{5}  \\  \\  \frac{4}{20}  =  \frac{1}{5}  \\  \\  \frac{6}{30}  =  \frac{1}{5}  \\  \\  \frac{8}{40}  =  \frac{1}{5}

so the option is D

please mark this answer as brainlist

3 0
2 years ago
A box of pens cost $6.50 and a box of pencils is $4.00. Jane gets 15% commission of each box of pencils sold. Calculate Jane's c
lys-0071 [83]

Answer:

10.50

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Write the equation of the line which has the given slope "m" and whivh passes through the given point...
VladimirAG [237]

equation of the line which has the given slope "m" and whivh passes through the given point...

a.(2,10) and m= -4

b.(4,-4) and m=3/2

c.(0,0) and m=3/5

7 0
2 years ago
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Sin230° = _____<br><br> -sin50°<br> sin50°<br> sin130°
likoan [24]
Sin230=sin(180+50)=sin180cos50+cos180sin50=-sin50 answer 1
8 0
3 years ago
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