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fomenos
2 years ago
8

Simplify the expression 7C4

Mathematics
1 answer:
Nady [450]2 years ago
6 0
To simplify 7C4 we use the combination formula given by:
nCr=n!/[(n-r)!r!]
thus:
In our case we shall have:
n=7 and r=4
7C4
=7!/[(7-4)!4!]
=5040/[6×24]
=5040/144
=35

The answer is 35

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18n squared + 57n -10
aniked [119]
Most people use the decomposition method but i dont know how to do that so i use the Joes method a method similar to decomp. but easier.
canadian way

Find gcf: None
complet trinomial: 18n^2+57-10
find the product=10(18)
                       =-180
find the sum     =57
-3 and 60 goes into both meaning if you multiply 3 and60 you get -180 and if you add them you get 57.

so (n-3)(n+60)
divide by a in this case it 18
so (n<u>-3</u>)(n+<u>60</u>)
       18     18
do not divide. treat it like a fraction so you reduce it to lowest terms
(n<u>-3</u>)(n<u>-3)
</u>   18   10
<u /> at this point its reduced to lowest terms so now you take the deniminator and move it beside the "n"

=(18n-3)(10n-3)

therefore your answer is (18n-3)(10n-3)
I hoped this helped :)
3 0
3 years ago
Round 1.595 to 2 decimal places
Karo-lina-s [1.5K]
1.595 to 2 decimal points is 1.60 because the second decimal place is nearest to 10.
3 0
3 years ago
Draw a quick picture to show the number 68 In two ways
enot [183]
You can draw two quarters, a dime, a nickel, and three pennies. Or 6 dimes and 8 pennies.
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3 years ago
Solve. Answer with a number only. -2/5(x+6)=10
malfutka [58]

Answer:

x= -31

Step-by-step explanation:

3 0
2 years ago
Need help on numbers 3, 4, and 5 ill mark brainliest if they are right
erastovalidia [21]

Answer:

Step-by-step explanation:

3.   V triangular prism =B*h=18*12*35=7560 cubic feet

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6 0
2 years ago
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