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sineoko [7]
3 years ago
13

Six different​ second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic re

adings​ (in mmHg) are listed below. Find the​ range, variance, and standard deviation for the given sample data. If the​ subject's blood pressure remains constant and the medical students correctly apply the same measurement​ technique, what should be the value of the standard​ deviation? 148 147 138 150 125 144 a. Range equals nothing mmHg b. Sample varianceequals nothing mmHgsquared ​(Round to the nearest tenth as​ needed.) c. Sample standard deviationequals nothing mmHg​ (Round to the nearest tenth as​ needed.) What should be the value of the standard​ deviation? A. ​Ideally, the standard deviation would be zero because all the measurements should be the same. B. ​Ideally, the standard deviation would be one because all the measurements should be the same. C. ​Ideally, the standard deviation would be one because this is the lowest standard deviation that can be achieved. D. There is no way to tell what the standard deviation should be.
Mathematics
1 answer:
Sauron [17]3 years ago
7 0

Answer:

What? Hey no no no yes what no no yes what yes yes

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A cafe only sells two types of sandwiches, turkey and steak. The cafe charges $4 for turkey sandwiches and $6 for steak sandwich
valkas [14]

Answer:

513 turkey sandwiches were sold.

Step-by-step explanation:

Let's use x to represent turkey sandwiches and y to represent steak sandwiches.

x = turkey sandwiches

y = steak sandwiches

x + y = 925 total sandwiches that were sold

4x + 6y = 4524 dollars that were made

x + y = 925\\y = 925 - x

Now that we know what y (steak sandwiches) equals, we plug it in to an equation to find x.

4x + 6(925-x) = 4524\\4x + 5550 -6x=4524\\

Now, we subtract 5,550 from BOTH sides so we can get x by itself.

-2x + 5550 - 5550 = 4524 - 5550\\-2x = -1026

Next, we divide both sides by 2, so x is bare.

\frac{2x}{2} = \frac{1026}{2}

x = 513

Since x represents turkey sandwiches, we have our answer: 513 turkey sandwiches were sold.

I hope this helps! :)

3 0
3 years ago
HELP!!!<br> HALP MEEEEEEEE
goldfiish [28.3K]

Answer:

Bryce's unit rate in miles around the track is 3 rate per mile . Now, as we know the formula for speed i.e. So, Bryce's unit rate in miles around the track is 3 rate per mile .

4 0
3 years ago
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When a number is decreased by 16% of itself the result is 159.6. What is the number?
Rufina [12.5K]

Hey there! I'm happy to help!

Let's call this number n. Here is the info we can write about it. Remember that to write as a percent as a decimal you divide by 100.

n-0.16n=159.6

We combine like terms.

0.84n=159.6

We divide both sides by 0.84

n=190

Have a wonderful day! :D

7 0
3 years ago
A box of 15 cookies costs $9.<br> What is the cost for 1 cookie? <br> $_____
mel-nik [20]

Answer:

15 box of cookies =$9

1 box of cookie = $9/15=$0.6

6 0
3 years ago
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Wat is 7x² + 4x - 5= 0
frosja888 [35]
Answer and workings in the attachment below.

4 0
3 years ago
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