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saw5 [17]
3 years ago
6

Evaluate the factorial expression. 9!/(9-2)!

Mathematics
1 answer:
ra1l [238]3 years ago
8 0

Answer:

72

Step-by-step explanation:

\frac{9!}{(9 - 2)!}  \\  \\  =  \frac{9!}{7!}  \\  \\  =  \frac{362880}{5040}  = 72

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Y/-7 = 1/14<br> y = ?<br> pls answer as a reduced fraction.
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Two warning lights flash on the fences of Jurassic Park. One light flashes every 3 seconds. Another light flashes
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5 times

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Four friends went to the movies each ticket cost $8 and each person bought popcorn and a soda for $5 how much did they spend in
Neporo4naja [7]
Answer: m = $52

Explanation:
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Popcorn & Soda (s)= $5
Friends = 4
Since all friends bought the same thing the equation will be set as
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7 0
3 years ago
7. a hockey arena has 10 920 seats. the first row of seats around the rink has 220 seats. the number of seats in each subsequent
Mazyrski [523]

The number of rows in the arena is 26

<h3>How to determine the number of rows?</h3>

The hockey arena illustrates an arithmetic sequence, and it has the following parameters:

  • First term, a = 220
  • Sum of terms, Sn = 10920
  • Common difference, d = 16

The number of rows (i.e. the number of terms) is calculated using:

S_n = \frac{n}{2}(2a + (n -1) * d)

So,we have:

10920 = \frac{n}{2}(2 * 220 + (n -1) * 16)

Evaluate the terms and factors

21840 = n(440 + 16n -16)

Evaluate the like terms

21840 = n(424+ 16n)

Expand

21840 = 424n + 16n^2

Rewrite as:

16n^2 + 424n - 21840 = 0

Using a graphical tool, we have:

n = 26

Hence, the number of rows in the arena is 26

Read more about arithmetic sequence at:

brainly.com/question/6561461

#SPJ1

4 0
2 years ago
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