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Rus_ich [418]
3 years ago
9

A container has 1 pink block and 3 green blocks. Juan wants to make the probability of randomly selecting a black block equal to

50%. How many black blocks should he add?
Mathematics
1 answer:
alex41 [277]3 years ago
8 0

Answer:

4

Step-by-step explanation:

He should add 4 black blocks because there are a total of 4 other blocks, and in order to have a probability of 50%, the number of black blocks needs to be equal to the total number of the other colored blocks.

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Help PLSSSSSSSSSSSSSSSSSSSSSSSSS :c
AfilCa [17]

Answer:

-8

Step-by-step explanation:

3+8+8-2=17

7+4+5+1=17

10+12+3+x=17

x=17-25

=-8

5 0
3 years ago
A population of 1,000 squirrels lives on a rectangle-shaped farm plot that is 25 feet long by 10 feet wide what is the populatio
Lemur [1.5K]
First, find the area of the plot:
25*10=250

1000/250 is 4

the population density is 4 squirrels per square foot.
5 0
3 years ago
sam goes to lunch with a friend. the total cost of the lunch is $15 . sam leaves $1.50 as a tip. what percent of total did he ti
gavmur [86]
It should be a 10% tip. To simplify the answer, The decimal moves one space (which would be equal to a tenth) so it’s a 10%
7 0
3 years ago
If 2a - b = 4 , find a.
julia-pushkina [17]
<h2>Answer:  a = ¹/₂ (4 + b)</h2>

<h3>Step-by-step explanation:</h3>

To solve for 'a' we have to make it the subject of the equation. Since there are two unknowns ('a' & 'b'), we won't get a numerical value of 'a', but an expression in terms of the second unknown 'b'.

Since 2a - b = 4                    <em> [add 'b' to both sides]</em>

then          2a = 4 + b             <em>[divide both sides by 2 = multiplying by  ¹/₂]</em>

                   a = ¹/₂ (4 + b)

3 0
3 years ago
A researcher is studying a mouse population in a field. For the first year of her study, she notices that the mouse population d
Montano1993 [528]

Answer:

The 500 mice would be the carrying capacity of the field being studied.

Step-by-step explanation:

For the first year of study, the mouse population demonstrates exponential growth.

But by third year, the mouse population has stabilized at approximately 500 mice.

Thus, this 500 mice would be the carrying capacity of the field being studied.

Carrying capacity is defined as the measure to demonstrate the maximum population size that any given environment can sustain for an unspecified time period.

5 0
3 years ago
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