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Nostrana [21]
2 years ago
8

What is the estimate for 5.29+6.78

Mathematics
2 answers:
Nana76 [90]2 years ago
6 0
The estimate for 5.29=5.00the estimate for 6.78=7.00
Viktor [21]2 years ago
5 0
5.3 + 6.8 = 12.1 when you estimate round the numbers
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Find out the number of combinations and the number of permutations for 8 objects taken 6 at a time. Express your answer in exact
umka2103 [35]

Solution:

The permutation formula is expressed as

\begin{gathered} P^n_r=\frac{n!}{(n-r)!} \\  \end{gathered}

The combination formula is expressed as

\begin{gathered} C^n_r=\frac{n!}{(n-r)!r!} \\  \\  \end{gathered}

where

\begin{gathered} n\Rightarrow total\text{ number of objects} \\ r\Rightarrow number\text{ of object selected} \end{gathered}

Given that 6 objects are taken at a time from 8, this implies that

\begin{gathered} n=8 \\ r=6 \end{gathered}

Thus,

Number of permuations:

\begin{gathered} P^8_6=\frac{8!}{(8-6)!} \\ =\frac{8!}{2!}=\frac{8\times7\times6\times5\times4\times3\times2!}{2!} \\ 2!\text{ cancel out, thus we have} \\ \begin{equation*} 8\times7\times6\times5\times4\times3 \end{equation*} \\ \Rightarrow P_6^8=20160 \end{gathered}

Number of combinations:

\begin{gathered} C^8_6=\frac{8!}{(8-6)!6!} \\ =\frac{8!}{2!\times6!}=\frac{8\times7\times6!}{6!\times2\times1} \\ 6!\text{ cancel out, thus we have} \\ \frac{8\times7}{2} \\ \Rightarrow C_6^8=28 \end{gathered}

Hence, there are 28 combinations and 20160 permutations.

7 0
11 months ago
More easy math for points
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256*16 is the correct answer here.
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2 years ago
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1 is the answer trust me
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7 0
3 years ago
A number minus 5 is between 2 and 8
vredina [299]

Answer:

either 7 or 8 but, 8 is most likely.

start with the numbers in the set 2,3,4,5,6,7,8

its supposed to be between 2 and 8

the only number that would work is 7 and 8 if you use 7 you get 2 and if you use 8 you get 3

5 0
3 years ago
Read 2 more answers
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