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Yakvenalex [24]
3 years ago
11

Please please help marking brainlist but if you dont know than dont answer please thank you

Mathematics
1 answer:
zloy xaker [14]3 years ago
5 0

Answer:

1. z = 5,  2. w = 9

Step-by-step explanation:

1. 5z - 4 = 21

5z = 21 + 4

5z = 25

z = 25/5

z = 5

2. w/9 + 2 = 3

w/9 = 3 - 2

w/9 = 1

w = 1 x 9

w = 9

I hope this helps :)

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A deck of cards contains 6 black cards and 6 red cards. The first card drawn is not replaced before drawing the second card.
exis [7]

Answer : 5/22

A deck of cards contains 6 black cards and 6 red cards. The first card drawn is not replaced before drawing the second card.

Total number of outcome of cards = 12

Probability( any event)= favorable outcomes divide by total number of outcomes

Probability of selecting black card = \frac{6}{12} =\frac{1}{2}

The drawn card is not replaced . so 11 cards left . In that 11 cards, 5 black cards because one black card is already chosen

Probability of selecting another black card = \frac{5}{11}

Probability of selecting a black card followed by another black card =

= \frac{1}{2}*\frac{5}{11}

=\frac{5}{22}



4 0
3 years ago
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Dennis_Churaev [7]

Answer:

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4 0
3 years ago
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PilotLPTM [1.2K]
X = 9 - 3, does this help?
7 0
3 years ago
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Use the value of the discriminant to determine the type of roots for x²-3x+1=0
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Hi,

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