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sergey [27]
3 years ago
15

Solve each system by elimination. - 6r – 6y = -18 -5r + 8y = 24

Mathematics
1 answer:
CaHeK987 [17]3 years ago
8 0

Answer:

Step-by-step explanation:

30r + 30y = 90

-30r + 48y= 144

78y = 234

y = 3

-6r - 6(3) = -18

-6r - 18 = -18

-6r = 0

r = 0

(0, 3)

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A 12-member jury is to be selected from 15 men and 13 women. Find the probability that this jury has 6 or 7 males.
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Answer:

The right solution is "0.5545".

Step-by-step explanation:

According to the question,

The probability of having 6 or 7 males will be:

= P(6 \ males)+ P(7 \ males)

= \frac{15_C_6\times 13_C_6}{28_C_{12}} + \frac{15_C_7\times 13_C_5}{28_C_{12}}

= \frac{5005\times 1716+6435\times 1287}{30421755}

= \frac{16870425}{30421755}

= 0.5545

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3 years ago
Dr. Hilton uses the graph to determine if a patient has a
seropon [69]

Answer:

At least 100 degrees

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The correct conclusion here is that a person has a fever once his/her temperature is greater than or equal to 100 degrees.

How do we know this from the graph? from the graph, we can see a yellow circular mark placed on 100. This indicates that we are starting our consideration from the point 100 degrees. What we don not know is if our answer is less than, greater than, less than or equal to or greater than or equal to.

The correct answer is however greater than or equal to. Firstly we check the fill of the yellow circular mark. Once it is filled and not left blank, then it indicates an equal to relationship, meaning 100 degrees itself is included in the range.

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Answer: D. (-6,2)

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y = x + 8  

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2x + x +8 = -10

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( x, y) = ( -6, 2)

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3 years ago
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