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BartSMP [9]
4 years ago
9

This is for permutations and combinations, what is the answer?

Mathematics
1 answer:
Stolb23 [73]4 years ago
6 0
We can write "n C r" as "C(n,r)" which is more function notation in style. 
C(n,r) = C(n,n-r) due to symmetry on Pascal's Triangle

Based on that rule
C(50,45) = C(50,5)
note how n = 50, r = 45, n-r = 50-45 = 5

Answer: Choice B
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5/10 or 1/2

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5 0
3 years ago
Given the function f(x) = 4x+2, what is the value of f(3)?
Masja [62]

Answer: f(3) = 14

Concept:

Here, we need to understand the idea of evaluation.  

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

<u>Given function</u>

f(x) = 4x + 2

<u>Substitute value of the x into the expression</u>

f(3) = 4(3) + 2

<u>Simplify by multiplication</u>

f(3) = 12 + 2

<u>Simplify by addition</u>

f(3) = \boxed{14}

Hope this helps!! :)

Please let me know if you have any questions

7 0
3 years ago
Find the value of each variable. What are x and y ?
hram777 [196]

Answer:

Step-by-step explanation:

since 105 + z is a straight line we know it equals 180 so we can use this equation

180 = 105 + z

simplify

75 = z

the since we know that all quadrilaterals equal 360 degrees we can add our two given number and z then subtract from 360:

102 + 85 + 75

= 262

now subtract

360 - 262

= 98

y = 98

hope this helps <3

8 0
3 years ago
Read 2 more answers
11.2ft<br> 14 ft<br> 8.4ft<br> 22.4ft
jeka57 [31]

Answer:

what's the context of the question

Step-by-step explanation:

5 0
3 years ago
Which of the following is the portion of a line that starts at one point and goes off in a particular direction to infinity?
NeTakaya
Answer: Vertex
Explanation:
4 0
3 years ago
Read 2 more answers
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