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zysi [14]
3 years ago
7

Can someone please help me with this?? im trying to correct answers and i need help

Mathematics
1 answer:
vivado [14]3 years ago
6 0

Answer:

90° is correct answer. :)

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A plane flew at a constant speed and traveled 762762762 miles in 555 hours.
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Answer:

457657657.2

Step-by-step explanation:

(762762762/5)*3=457657657.2 miles

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How can i know where to place the first digit of a quotient
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(2x -5) - 1.75(x+4) simplify
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Step-by-step explanation:

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A gallery has 25 paintings in its permanent collection, with display space for 10 at one time. How many different collections ca
Anastaziya [24]
You need to know in how many ways you can choose 10 out of 25 items when order does not matter. This is a combination problem.

_{n}C_{r} =  \dfrac{n!}{(n - r)!r!}

_{25}C_{10} =  \dfrac{25!}{(25 - 10)!10!}

_{25}C_{10} =  \dfrac{25 \times 24 \times 23 \times 22 \times 21 \times 20 \times 19 \times 18 \times 17 \times 16 \times 15!}{15! \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}

_{25}C_{10} =  \dfrac{25 \times 24 \times 23 \times 22 \times 21 
\times 20 \times 19 \times 18 \times 17 \times 16}{10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 
\times 2 \times 1}

_{25}C_{10} =  \dfrac{23 \times 11 \times 20 \times 19 \times 2 \times 17}{1}

_{25}C_{10} = 23 \times 11 \times 20 \times 19 \times 2 \times 17

_{25}C_{10} = 3,268,760

6 0
4 years ago
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Which statements about limiting reactants are correct? more than one answer may be correct?
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Where is the question?
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