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geniusboy [140]
3 years ago
7

Here are the images:

Mathematics
2 answers:
nataly862011 [7]3 years ago
4 0

Answer:

the anwer is D: all of the above

Step-by-step explanation:

erastova [34]3 years ago
3 0

Answer:

all of the above

Step-by-step explanation:

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Suppose you have 20 coins that total $3.00. Some coins are nickels and some are quarters. Which of the following pairs of equati
kap26 [50]

Answer:

Step-by-step explanation:

n + q = 20

.05n + .25q = 3.00

5n + 25q = 300

 n + q = 20

5n + 25q = 300

-5n - 5q = -100

20q = 200

q = 10 quarters

n + 10 = 20

n = 10 nickels

(10 nickels, 10 quarters)

5 0
3 years ago
a five-card hand is dealt at random from a standard deck. What is the probability that the hand contains exactly two black cards
mestny [16]

Using the principle of binomial probability, the probability of having exactly two black cards is 0.3125

  • <em>Probability</em><em> </em><em>of</em><em> </em><em>having</em><em> </em><em>a</em><em> </em><em>black</em><em> </em><em>card</em><em> </em><em>=</em><em> </em><em>26</em><em>/</em><em>52</em><em> </em><em>=</em><em> </em><em>1</em><em>/</em><em>2</em><em> </em>

<u>Using the binomial probability relation</u> :

  • P(x = x) = nCx * p^x * q^(n-x)
  • <em>p</em><em> </em><em>=</em><em> </em><em>probability</em><em> </em><em>of</em><em> </em><em>success</em><em> </em><em>=</em><em> </em><em>1</em><em>/</em><em>2</em><em> </em><em>=</em><em> </em><em>0</em><em>.</em><em>5</em>
  • <em>Number of</em><em> </em><em>picks</em><em>,</em><em> </em><em>n</em><em> </em><em>=</em><em> </em><em>5</em>
  • <em>q</em><em> </em><em>=</em><em> </em><em>1</em><em> </em><em>-</em><em> </em><em>p</em><em> </em><em>=</em><em> </em><em>0.5</em><em> </em>
  • <em>x</em><em> </em><em>=</em><em> </em><em>2</em><em> </em>

Hence,

P(x = 2) = 5C2 × 0.5² × 0.5³

P(x = 2) = 10 × 0.25 × 0.125

P(x = 2) = 0.3125

Hence. Probability of having exactly 2 black cards is 0.3125

Learn more : brainly.com/question/12474772

6 0
2 years ago
Hey guys I really need help and it also asks to give my answer as a decimal!​
amid [387]

Answer:

(1,5)  is your answer

Step-by-step explanation:

You would have to divide the

2 and 10 by 2 and you would get (1,5)

Hope that help!Have a GREAT day!!

And Brainiest is needed!

7 0
3 years ago
What does (b + 3) + 6= ?
Gekata [30.6K]

Answer:

(b + 3) + 6 = <u>b + 9</u>

Explanation:

The order in which you add numbers together doesn't matter.

6 0
3 years ago
What is the probability of rolling a number 2 or less on a dice?
scoray [572]

Answer:

1/3 if it's a standard die with the highest number being 6.

Step-by-step explanation:

3 0
3 years ago
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