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3 years ago

Evaluate C(5, 0). Combinations

1 answer:

5 0

The general equation for the combination is as shown below,

C(n,r) = n!/(r!(n-r)!)

Note that the symbol "!" means factorial.

In our example, n = 5 and r = 0. Substituting the known values,
C(5,0) = 5!/(0!(5-0)!) = 1

The answer to this item is 1.

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1/4(X-10)=2X+1 what is X?

In-s [12.5K]

Answer: $x=-2$

Step-by-step explanation:

$\frac{1}{4}(x-10)=2x+1$

Distribute 1/4

$\frac{1}{4}x-\frac{1}{4}(10)=2x+1$

$\frac{1}{4}x-\frac{5}{2}=2x+1$

add 5/2

$\frac{1}{4}x-\frac{5}{2}+\frac{5}{2}=2x+1+\frac{5}{2}$

$\frac{1}{4}x=2x+\frac{1*2+5}{2}$

$\frac{1}{4}x=2x+\frac{2+5}{2}$

$\frac{1}{4}x=2x+\frac{7}{2}$

Subtract 2x

$\frac{1}{4}x-2x=2x-2x+\frac{7}{2}$

$\frac{1}{4}x-2x=\frac{7}{2}$

$\frac{1-2*4}{4}x=\frac{7}{2}$

$\frac{1-8}{4}x=\frac{7}{2}$

$-\frac{7}{4} x=\frac{7}{2}$

Multiply by the negative reciprocal of -7/4 which is basically inverting the fraction -4/7

$(-\frac{4}{7} )-\frac{7}{4} x=\frac{7}{2}(-\frac{4}{7} )$

$x=-\frac{28}{14}\\ x=-2$

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3 years ago

A scientist collected 7 water samples from local streams. Each sample was the same size, and she collected 0.7 liters of water i

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The volume of each sample is 0.10 liters of water from each water sample

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3 years ago

Solve The Following System of equations by graphing 3x + y = 5 x - 4y = 32

Nostrana [21]

first you convert to slope intercept form

3x+y = 5 is the same as y = -3x+5

x - 4y = 32 is the same as y = 4x-8

then you graph

(starting with the y-intercepts as your first points)

the point where the two lines intercept is your solution.

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Answer:

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Read 2 more answers

Is xy = yx? Explain how you know

blagie [28]

Answer:

Yes

Step-by-step explanation:

xy=yx because either way, you would end with the same product. For example, if x was 3 and y was 2, you would have (3)(2)=(2)(3), giving you 6=6 which is, in fact, a true statement.

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