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Fed [463]
3 years ago
14

in a set of 9 balls, 5 are blue. the balls are placed into a bag. mark is trying to get a ball that is not blue. he picks one ba

ll, puts it back, and then picks another ball. what is the probability he picked a blue ball both times
Mathematics
1 answer:
harina [27]3 years ago
4 0
So what you will have to do is 45 alla you have to do is multiple


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What is the slope of the line shown below
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Here's the slope form; (y2- y1) / (x2 - x1)

All you have to do now is just plug in the number into the formula.

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Answer this question to get marked as brainliest plus 15 points!!!!
Alchen [17]

Answer:

D

Step-by-step explanation:

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2 years ago
How do i calculate? All the way to s_75. It’s so long
mina [271]

Answer:

  -675

Step-by-step explanation:

The sum can be broken into parts that you know. Here, one of those parts is the sum of numbers 1 to n. That sum is given by n(n+1)/2.

\displaystyle S_{75}=\sum\limits_{n=1}^{75}{(67-2n)}=\sum\limits_{n=1}^{75}{67}-2\sum\limits_{n=1}^{75}{n}\\\\=75\cdot 67-2\dfrac{75(75+1)}{2}=75(67-76)\\\\=\bf{-675}

__

Another way to do this is to realize the sequence of numbers is an arithmetic sequence with a first term of 65 and a last term of 67-2·75 = -83.

The sum of an arithmetic sequence is found by multiplying the number of terms by their average value. Their average value is the average of the first and last terms.

The average value of those 75 terms is (65 +(-83))/2 = -9, so their sum is ...

  75(-9) = -675

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3 years ago
Identity the slope and y-intercept<br> (-2,-3) (0,5)
kiruha [24]

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slope (m) = 4

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