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Zarrin [17]
3 years ago
12

A bag contains 3 red cubes, 4 yellow cubes, and 3 green cubes. You choose a cube without looking, note its color, and put the cu

be back in the bag. Suppose you do this a total of 80 times. About how many times would you expect to choose a red or yellow cube?
Mathematics
2 answers:
Alex Ar [27]3 years ago
6 0

Answer:

is it multiple choice that would help

Step-by-step explanation:

Nastasia [14]3 years ago
4 0

Answer:

  • 56 times

Step-by-step explanation:

<u>Total cubes:</u>

  • 3 + 4 + 3 = 10

<u>Number of yellow or red:</u>

  • 3 + 4 = 7

<u>Probability of yellow or red:</u>

  • 7/10

<u>Same probability 80 times:</u>

  • 80*7/10 = 56

Expected number is 56

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3 years ago
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Olegator [25]

Given :

The percent of concentration of a certain drug in the bloodstream x hours after the drug is administered is given by K(x) = \dfrac{5x}{x^2+9}.

To Find :

Find the time at which the concentration is a maximum. b. Find the maximum concentration.

Solution :

For maximum value of x, K'(x) = 0.

K'(x) = \dfrac{5(x^2+9)- 5x(2x)}{(x^2+9)^2}=0\\\\5x^2+45-10x^2=0\\\\5x^2 = 45\\\\x = \pm 3

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5 0
3 years ago
2x-4=x+6 how solve this
Alexandra [31]

Answer:

x = 10

Step-by-step explanation:

1. Add 4 to both sides of the equation

2. Simplify

3. Subtract x from both sided of the equation

4. Simplify

Therefore, x = 10

Hope this helps :)

6 0
2 years ago
I really need help please.
love history [14]

Answer:

64

Step-by-step explanation:

6 0
3 years ago
Which is an equivalent to to 752<br> O 1412<br> 021-10<br> 021-15
Stella [2.4K]
The answer to this equation is 1412 or 21-15
6 0
3 years ago
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