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3 years ago

When multiplying or dividing an inequality by a negative number, you must reverse (flip) the sign of the inequatlity.

Mathematics

2 answers:

Studentka2010 [4]3 years ago

5 0

True......!,!!!.,.,.,.,.

mr_godi [17]3 years ago

3 0

Answer:

True

Step-by-step explanation:

You are always required to flip the sign if you are dividing or multiplying by a negative number.

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Answer:

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Step-by-step explanation:

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3 years ago

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. In the 1980's it was generally believed that congenital abnormalities affected about 5% of the nation's children. Some people

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Step-by-step explanation:

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3 years ago

The median to 4.7,8.51,6.5,7.42,9.64,7.2,9.3

Sonja [21]

4.7, 8.51, 6.5, 7.42, 9.64, 7.2, 9.3

4.7 6.5 7.2 7.42 8.52 9.3 9.64

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3 years ago

Please help ASAP!!! Tyler currently earns $15.50/h. Mr. Davis decides to give Tyler a 10% raise and a one-time bonus for this we

lbvjy [14]

10% raise
hmm
find his amount earned first
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15.5 times 35=542.5
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542.5 times 1.10=596.75
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3 years ago

Professor Sanchez has been teaching Principles of Economics for over 25 years. He uses the following scale for grading. Grade Nu

Tasya [4]

The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Question:

Professor Sanchez has been teaching Principles of Economics for over 25 years. He uses the following scale for grading. Grade Numerical Score Probability A 4 0.090 B 3 0.240 C 2 0.360 D 1 0.165 F 0 0.145

a. Convert the above probability distribution to a cumulative probability distribution. (Round your answers to 3 decimal places.)

b. What is the probability of earning at least a B in Professor Sanchez’s course? (Round your answer to 3 decimal places.)

c. What is the probability of passing Professor Sanchez’s course? (Round your answer to 3 decimal places.)

Answer:

a. Cumulative Probability Distribution

Grade P(X ≤ x)

F 0.145

D 0.310

C 0.670

B 0.910

A 1

b. P(at least B) = 0.330

c. P(pass) = 0.855

Step-by-step explanation:

Professor Sanchez has been teaching Principles of Economics for over 25 years.

He uses the following scale for grading.

Grade Numerical Score Probability

A 4 0.090

B 3 0.240

C 2 0.360

D 1 0.165

F 0 0.145

a. Convert the above probability distribution to a cumulative probability distribution. (Round your answers to 3 decimal places.)

The cumulative probability distribution is given by

Grade = F

P(X ≤ x) = 0.145

Grade = D

P(X ≤ x) = 0.145 + 0.165 = 0.310

Grade = C

P(X ≤ x) = 0.145 + 0.165 + 0.360 = 0.670

Grade = B

P(X ≤ x) = 0.145 + 0.165 + 0.360 + 0.240 = 0.910

Grade = A

P(X ≤ x) = 0.145 + 0.165 + 0.360 + 0.240 + 0.090 = 1

Cumulative Probability Distribution

Grade P(X ≤ x)

F 0.145

D 0.310

C 0.670

B 0.910

A 1

b. What is the probability of earning at least a B in Professor Sanchez’s course? (Round your answer to 3 decimal places.)

At least B means equal to B or greater than B grade.

P(at least B) = P(B) + P(A)

P(at least B) = 0.240 + 0.090

P(at least B) = 0.330

c. What is the probability of passing Professor Sanchez’s course? (Round your answer to 3 decimal places.)

Passing the course means getting a grade of A, B, C or D

P(pass) = P(A) + P(B) + P(C) + P(D)

P(pass) = 0.090 + 0.240 + 0.360 + 0.165

P(pass) = 0.855

Alternatively,

P(pass) = 1 - P(F)

P(pass) = 1 - 0.145

P(pass) = 0.855

4 0

3 years ago