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lapo4ka [179]
3 years ago
7

What is 42/70 x 20/22

Mathematics
1 answer:
rusak2 [61]3 years ago
6 0

Answer:

6/11 or 0.545

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A sample of blood pressure measurements is taken for a group of​ adults, and those values​ (mm Hg) are listed below. The values
nika2105 [10]

Answer:

For systolic pressure data:

\bar X =127.2\\\\S=17.91668\\\\CV=\frac{17.91668}{127.2}=0.14085

For diastolic pressure data:

\bar X =73.5\\\\S=12.54\\\\CV=\frac{73.5}{12.54}=0.17061

Systolic pressure is slightly less variable, among individuals in the sample, than diastolic pressure.

Step-by-step explanation:

The coefficient of variation is defined as the percentage relative variation of a set of data with respect to its average. And it is calculated like this:

CV=\frac{\bar X}{S}

S =\sqrt{\frac{1}{n-1} \sum_{i=1}^n (x_i-\bar{x})^2

\bar X={\frac{1}{n} \sum_{i=1}^n x_i

For systolic pressure data:

\bar X =127.2\\\\S=17.91668\\\\CV=\frac{17.91668}{127.2}=0.14085

For diastolic pressure data:

\bar X =73.5\\\\S=12.54\\\\CV=\frac{12.54}{73.5}=0.17061

It is observed that the systolic pressure shows greater standard deviation but less coefficient of variation. This is due to the greater magnitude of its measurement scale.

Systolic pressure is slightly less variable, among individuals in the sample, than diastolic pressure.

7 0
3 years ago
Write an expression that shows the product of 5 and the difference of 12 and 9.
sattari [20]
I think the answer is: 5 x (12-9) = 15

8 0
3 years ago
3(3y-4)=51 solve for y
Luba_88 [7]

Answer:

y = 7

Step-by-step explanation:

3 × (3y - 4) = 51 multiply 3 with inside the parenthesis

9y - 12 = 51 add like terms

9y = 51 + 12

9y = 63

y = 7

4 0
3 years ago
Read 2 more answers
Simplify the expression 3x•(7•x) explain
yuradex [85]

Steps to solve:

3x * (7 * x)

~Simplify

3x * 7x

~Combine like terms

21x

Best of Luck!

7 0
3 years ago
Read 2 more answers
Having a little trouble help?
Yakvenalex [24]

Answer:

x/5 - 7 = 8

Step-by-step explanation:

4 0
3 years ago
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