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zavuch27 [327]
3 years ago
10

A bag contains 7 green balls and 3 white balls.

Mathematics
2 answers:
tia_tia [17]3 years ago
6 0

10 balls in total therefore

A) chance of being white is 3/10

Chance twice: 3/10

Both white = 3/10 x 3/10 = 9/100

B) 3/10 x 7/10 = 21/100

Orlov [11]3 years ago
3 0

10 total balls.

A) first pick white = 3/10

Second pick white = 3/10

Both white = 3/10 x 3/10 = 9/100

B) 3/10 x 7/10 = 21/100

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Evaluate 3x+4(y+3) when x is 5 less than the quotient of y and 3, and y=18.
romanna [79]

It is given that x is 5 less than the quotient of y and 3.

And given value of y is 18 .

So quotient of y and 3 is

\frac{18}{3} = 6

And 5 less than 6 =1

So we have y=18 and x=1

Given expression is

3x+4(y+3)

At x=1 and y=18, we will get

3(1)+4(18+3) =3 + 4(21)

= 3+84=87

4 0
3 years ago
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Sergio [31]

Step-by-step explanation:

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4 0
3 years ago
Item 20 You are riding a roller coaster when a shoe falls off your foot. The function y=200−16t2 represents the height y (in fee
AleksandrR [38]
Assuming you mean y = 200 - 16t^2, we have all the required information needed to solve this problem. The y-value is the height of the building and the t-value represents the number of seconds after the shoe fell off.

Since we are trying to solve <em>for t</em>, we will be using our y-value. The problem states that we landed on a building with a height of 31 feet. We can plug this into the y-value, since that is what y is defined as (the height of the building).

Now we have:
31 = 200 - 16t^2

We can solve this to find t:
-169 = -16t^2
169 = 16t^2
10.5625 = t^2
3.25, -3.25 = t

We have found two answers for t. However, the negative value is not a solution because we can not have a negative number of seconds. Thus, 3.25 is the only value of t which works for this problem.

Since t is the value we are trying to find, we have our answer. The shoe hits the building after 3.25 seconds.
7 0
3 years ago
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What is the sum? 3k/k^2+k-7/4K
Aleksandr-060686 [28]

Answer:

  \dfrac{k^2+5k}{4k^2}

Step-by-step explanation:

A suitable common denominator is 4k^2. (This eliminates the first and last choices.)

\dfrac{3k}{k^2}+\dfrac{k-7}{4k}=\dfrac{4(3k)}{4(k^2)}+\dfrac{k(k-7)}{k(4k)}\\\\=\dfrac{12k+k^2-7k}{4k^2}=\boxed{\dfrac{k^2+5k}{4k^2}}

3 0
3 years ago
How will the graph of line y = -5x + 7 be affected if the 7 is changed to –7?
dybincka [34]

Answer:a

Step-by-step explanation:

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3 years ago
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