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arlik [135]
2 years ago
10

Which of the following expressions would give the number of ways to choose a group of 7 from a group of 15?

Mathematics
1 answer:
OLga [1]2 years ago
5 0

Answer:

B

Step-by-step explanation:

The number of ways to choose a combination of 7 objects from a group of 15 objects is 15! / (7! 8!)

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Can you help me on this?
Illusion [34]

Answer:

y = 30

Step-by-step explanation:

We can use ratio's to solve this

40        20

-----  = -----------

100       20 + y


Using cross products

40 * (20+y) = 20*100

Distribute

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Step-by-step explanation:

15.) -7x + 6 (x - 8/2) - 2(x + 3) + 10

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Ronch [10]

Answer:

10.77

Step-by-step explanation:

by using Pythagoras theorem we can find the distance between the points,

so...

distance between the points, which is the hypotenuse will be xy

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difference between the x coordinates will be dx

according to pythagoras theorem,

xy^{2} = dx^{2} +  dy^{2} \\xy^{2} = (-6-(-2))^{2} + (-5-5)^{2}\\xy^{2} =(-4)^{2} +(-10)^{2} \\xy^{2} =16+100\\xy^{2} =116\\xy =\sqrt{116} \\xy=10.77

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2 years ago
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