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Lerok [7]
3 years ago
12

Which set is closed under subtraction?

Mathematics
1 answer:
Semmy [17]3 years ago
4 0

Answer:

Set of rational numbers

Step-by-step explanation:

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The perimeter of a regular hexagon is 15 centimeters. What is the length of each side?
Scilla [17]

a regular hexagon has 6 sides so divide the perimeter by number of sides to find the length

15/6 = 2.5 cm

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What is the following product? Assume x greater-than-or-equal-to 0 and y greater-than-or-equal-to 0
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3 years ago
Please no link and please don't put it in fraction form or decimal just basic number
True [87]
1/3 of 42 = 14 ( Alyanna)
4/7 of 42 = 24 ( Rose )

24+14= 38
42-38= 4

There are 4 cards left to sign
5 0
2 years ago
Read 2 more answers
Which system of equations represents the matrix shown below?
svetlana [45]

Answer:

D

Step-by-step explanation:

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4 0
4 years ago
According to a study in a medical journal, 202 of a sample of 5,990 middle-aged men had developed diabetes. It also found that m
tekilochka [14]

Answer:

0.0588 = 5.88% probability that a middle-aged man with diabetes is very active

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Has diabetes.

Event B: Is very active.

Probability of having diabetes:

To find this probability, we take in consideration that:

It also found that men who were very active (burning about 3,500 calories daily) were a fourth as likely to develop diabetes compared with men who were sedentary. Assume that one-fifth of all middle-aged men are very active, and the rest are classified as sedentary.

So the probability of developing diabetes is:

x of 4/5 = x of 0.8(not active)

x/4 = 0.25x of 1/5 = 0.2(very active). So

P(A) = 0.8x + 0.25*0.2x = 0.85x

Probability of developing diabetes while being very active:

0.25x of 0.2. So

P(A \cap B) = 0.25x*0.2 = 0.05x

What is the probability that a middle-aged man with diabetes is very active?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.05x}{0.85x} = \frac{0.05}{0.85} = 0.0588

0.0588 = 5.88% probability that a middle-aged man with diabetes is very active

4 0
3 years ago
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