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3 years ago

Evaluate C7, 5). A. 21 B. 42 C. 1,008

Mathematics

1 answer:

faltersainse [42]3 years ago

4 0

<h3>Answer: A. 21</h3>

=======================================

C(n, r) = (n!)/(r!*(n-r)!) is the combination formula

C(7, 5) = (7!)/(5!*(7-5)!)

C(7, 5) = (7!)/(5!*2!)

C(7, 5) = (7*6*5!)/(5!*2!)

C(7, 5) = (7*6)/(2!) ..... note the "5!" terms divided and canceled

C(7, 5) = (7*6)/(2*1)

C(7, 5) = 42/2

C(7, 5) = 21

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4 years ago

Branliest offered <br> Solve equation <br> 6x+3x+8=35<br> 12w-5-3w=40

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6x+3x+8=35
Step 1: Simplify both sides of the equation.
6x+3x+8=35
(6x+3x)+(8)=35(Combine Like Terms)
9x+8=35
9x+8=35
Step 2: Subtract 8 from both sides.
9x+8−8=35−8
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Step 3: Divide both sides by 9.
9x
9
=
27
9
x=3
Answer:
x=3
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Step 1: Simplify both sides of the equation.
12w−5−3w=40
12w+−5+−3w=40
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9w+−5=40
9w−5=40
Step 2: Add 5 to both sides.
9w−5+5=40+5
9w=45
Step 3: Divide both sides by 9.
9w
9
=
45
9
w=5
Answer:
w=5

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4 years ago