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tatiyna
3 years ago
12

((sinB)/1+cosB) + ((1+cosB)/sinB) = 2cscB prove that the equation is an identity

Mathematics
1 answer:
Contact [7]3 years ago
4 0

Step-by-step explanation:

If you need any explanation, we can communicate normally

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Lydia had 20 minutes to do a three-problem quiz. She spent 9 7/10
steposvetlana [31]

Answer:

4 9/10 minutes.

Step-by-step explanation:

9 7/10 + 5 2/5 = 15 1/10.

20- 15 1/10 = 4 9/10 minutes.

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Brainliest?

5 0
3 years ago
A researcher found a study relating the value of a car, y, to the age of the car, x. When researchers looked at the association
vredina [299]

Answer: c) About 16% of the variation in value of the car is explained by a linear relationship with the age of the car.

e) The correlation coefficient, r, is 0.397.

Step-by-step explanation:

Given that:

Coefficient of determination (r²) between two variables, age of car (x) and value of car (y) = 0.158

Correlation of determination (r²) of 0.158 = (0.158 × 100% = 15.8% of the variation between the two variables can be explained by the regression line). Hence, about 16% of the variation between age and value of car can be explained by the linear relationship.

Coefficient of correlation (r) = sqrt(r²) = sqrt(0.158) = 0.397

8 0
4 years ago
The legend on a map states that
dimulka [17.4K]

Answer:

Step-by-step explanation:

1 cm=10 km

8 cm=10×8=80 km

4 0
3 years ago
Help me please ! Thank you
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4 0
3 years ago
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Find the indicated area under the curve of the standard normal​ distribution; then convert it to a percentage and fill in the bl
galben [10]

Answer:

95%

Step-by-step explanation:

About 95% of the area is within two standard deviation in standard normal distribution. This can be explained by finding the probability within 2 standard deviation using standard normal distribution.

P(z1<Z<z2)=P(-2<Z<2)

P(-2<Z<2)=P(-2<Z<0)+P(0<Z<2)

P(-2<Z<2)=0.4772+0.4772

P(-2<Z<2)=0.9544

Thus, About 95% of the area is between z2 and z2

4 0
3 years ago
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