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2 years ago

Question 2 of 10

Mathematics

1 answer:

agasfer [191]2 years ago

4 0

Step-by-step explanation:

two of the triangles' corresponding angles are the same even if the side lebgths are not, making these two similar

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Use a model to divide. 45 by 6

Savatey [412]

Answer:

45 / 6

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Consider the 20 points of a 4×5 grid. You randomly choose two points from the 20 points. What is the probability that the two po

Serhud [2]

Answer:

The probability of both points falling in the same row or column is 7/19, or approximately 37%

Step-by-step explanation:

The easiest way to solve this is to think of it rephrased as "what is the probability that your second point will be in the same row or column as your first point". With that frame of reference, you can simply consider how many other points are left that do or do not fall in line with the selected one.

After selecting one, there are 19 points left.

The row that the first one falls in will have 3 remaining empty points.

The column will have 4 remaining empty points.

Add those up and you have 7 possible points that meet the conditions being checked.

So the probability of both points falling in the same row or column is 7/19, or approximately 37%

6 0

2 years ago

A sample of blood pressure measurements is taken for a group ofadults, and those values (mm Hg) are listed below. The values a

scoundrel [369]

Answer:

1. coefficient of variation(systolic) = 13.88%

2. coefficient of variation(diastolic) = 16.2%

3. The coefficients of variation for each data set are within 5 percentage points of each other Therefore the systolic measurements vary signifcantly less than the diastolic

Step-by-step explanation:

1. Mean of systolic = ( 117+126+158+96+157+122+116+134+127+122)÷10

= 127.5

Standard Deviation of systolic = (((117-127.5)^2 +(126-127.5)^2+(158-127.5)^2+ (96-127.5)^2 + (157-127.5)^2 + (122-127.5)^2 + (116-127.5)^2 +(134-127.5)^2 +(127-127.5)^2 +( 122-127.5)^2) ÷ 10)^(0.5)

SD = 17.7

coefficient of variation(systolic)

= Standard Deviation of systolic /mean of systolic

= $\frac{17.7}{127.5} * 100$

coefficient of variation(systolic) = 13.88%

2. Mean of diastolic = ( 80+77+76+51+90+89+60+64+72+83) ÷ 10

= 74.2

Standard Deviation of diastolic = (((80-74.2)^2 +(77-74.2)^2+(76-74.2)^2+ (51-74.2)^2 + (90-74.2)^2 + (89-74.2)^2 + (60-74.2)^2 +(64-74.2)^2 +(72-74.2)^2 +(83-74.2)^2) ÷ 10)^(0.5)

SD = 12

coefficient of variation(diastolic)

= Standard Deviation of diastolic /mean of diastolic

= $\frac{12}{74.2} *100$

coefficient of variation(diastolic) = 16.2%

3. The coefficients of variation for each data set are within 5 percentage points of each other Therefore the systolic measurements vary signifcantly less than the diastolic

8 0

2 years ago

What is the median of the data?

UNO [17]

You need to order the data, so
11, 12, 13, 14, 14, 15, 17, 17, 18, 18, 18, 20
Then find the middle of the data. Because there are 12 data points, the median will lie between the two 6th placed numbers
The two numbers are 15 and 17, so work out the mean of them. (15+17)/2 = 16
So the answer is B. 16

3 0

2 years ago

7 - 3[(n 3 + 8n) ÷ (-n) + 9n 2]

posledela

Answer:

$-24n^{2} +31$