Is 25 greater or less than -4(-4)?

$_{10}C_7=\frac{10!}{7!(10-7)!}\\\\=\frac{10!}{7!3!}=\frac{10\times 9\times 8\times ...}{(7\times 6\times 5\times...)(3\times 2\times 1)}\\\\=\frac{10\times 9\times 8}{3\times 2\times 1}=\frac{720}{6}=120$

Step-by-step explanation:

A librarian choose seven holiday books from a selection of ten to be displayed in the window of the library. in how many different ways can she chose seven books?

This is a combination of 10 objects chosen 7 at a time:

$_{10}C_7=\frac{10!}{7!(10-7)!}\\\\=\frac{10!}{7!3!}=\frac{10\times 9\times 8\times ...}{(7\times 6\times 5\times...)(3\times 2\times 1)}\\\\=\frac{10\times 9\times 8}{3\times 2\times 1}=\frac{720}{6}=120$

3 0

3 years ago

Find the answer for the angles and give a reason for your answer

Andreas93 [3]

Answer:

each piece combined= 180

do 180- the # thats next to another

Step-by-step explanation:

5 0

3 years ago

25 cm 9 cm 11 cm 17 cm 3 cm 5 cm Find the area

julia-pushkina [17]

Answer:

631,125

Step-by-step explanation:

25x9x11x17x3x5= 631,125

4 0

3 years ago

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