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mart [117]
3 years ago
10

Determine the number of ways to choose a set of 9 pencils from a selection of 10.

Mathematics
1 answer:
enot [183]3 years ago
5 0
The second option. 10

Hope this helps<3
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Karen is seven years older than suzanne.Four years ago,karen was twice as old as suzanne was.How are they now?
EleoNora [17]
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3 0
3 years ago
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A certain positive number is multiplied by 4, and then the result is subtracted from the original number. The result is 21 less
stira [4]

Answer:

The number is 7

Step-by-step explanation:

certain positive number: x

x is multipled by 4:

4x

result of this is subtracted from the original number:

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x - 4x

the result is 21 less than 0, this means negative 21

x - 4x = 0 - 21 = -21

do algebra:

-3x = -21

multiply both sides by -1

3x = 21

divide both sides by 3

x=7

(certain positive number: x) is equal to 7

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3 years ago
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50 POINTS + BRAINLIEST
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slope = rise over run = y/x

A (-1,3) slope = 3/-1 = -3

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C (-3,-1) slope = -1/-3 = 1/3

2 lines need to be negative reciprocals in order to be a right triangle

negative reciprocal of -3 is 1/3

 so this is a right triangle


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3 years ago
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Ratling [72]
Your final answer for this question is -3(y-2)/2. Hope this helps.
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3 years ago
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Correct answer gets brainliest or who ever answered first
timurjin [86]

Answer:

B

Step-by-step explanation:

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