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Dima020 [189]
3 years ago
15

DA is a diameter of circle C. What is the measure of arc BD?

Mathematics
1 answer:
Annette [7]3 years ago
5 0

Answer:

130°

Step-by-step explanation:

1. to connect point A and B (green line);

2. the 1st row: to define measure of the angle ABD (90°);

3. the 2d row: to define measure of the angle BAD in the ΔABD (65°);

3. the 3d row: to calculate measure of the arc BD using the formula m(arc BD)=2*m(∠BAD).

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Can we predict how fast a tennis player can hit a serve from the playerâs height? The following computer output and scatterplot
olga_2 [115]

Complete question :

The computer output and scatter plot output pertaining to the question can be found in the attached picture.

Answer:

Kindly check explanation

Step-by-step explanation:

A.) Relationship between height and fastest serve speed :

According to the scatterplot and Correlation Coefficient (R) value which can be obtauned by getting the square root of R²

R = √27.7%

R = 0.5263 = 52.63% ; this depicts a fairly strong positive correlation or relationship between height and fastest serve speed

B.)

Equation of least square regression line :

From the computer output and scatter plot above :

Recall :

y = mx + c

y =predicted variable (s fastest serve)

m= slope

x = predictor variable (height)

c = intercept

y = 84.98x + 68.81

C.) 27.7% of the variation in fastest speed can be explained by height while the remaining percentage is due to other variables

D.) fastest serve of tennis player with height 1.7m

y = 84.98x + 68.81

y = 84.98(1.7) + 68.81

y = 213.276km/hr

E.)

R = √27.7%

R = 0.5263 = 52.63% ; this depicts a fairly strong positive correlation or relationship between height and fastest serve speed

F.)

Height = 2.06m = x

y = 84.98(2.06) + 68.81

y = 243.8688 km/hr

Residual = Actual - predicted

Actual = 230 ; predicted = 243.8688

Residual = 230 - 243.8688

Residual = −13.8688

Hence, the model overestimated fastest serve speed of a 2.06 m tall player by −13.8688 km/hr

3 0
3 years ago
I need this to be solved please!
AleksAgata [21]

Answer:

x=50

Explanation:

6 0
2 years ago
Read 2 more answers
A student must answer any three of the four essay questions on a social studies test. How many different selections of questions
Musya8 [376]
I'm pretty sure it would be 12....I think.
4 0
3 years ago
A man Buy television set at a price exclusive of sales tax for $2124 if sales tax of 12% is changed how much money does the man
Fed [463]

Answer:

2378.88

Step-by-step explanation:

12/100 x 2124

=254.88

2124+254.88=answer

6 0
2 years ago
PLEASE HELP!!! i’ll give brainliest
tekilochka [14]

Answer:

x = \sqrt{164

Step-by-step explanation:

In order to find the hypothenuse, you need to do 8^{2}  + 10^{2}. Which equals 164. Therefore, since a^{2} +b^{2} =c^{2}, a=8, b=10, and c=\sqrt{164.

8 0
3 years ago
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