Question

math help please........8th grade

Answer 1

fire away

Answer 2

aWhat is the value of 10C3?

A.
30

B.
720

C.
120

D.
1000

Answer 3

what do you think it is?

Answer 4

umm b

Answer 5

incorrect

Answer 6

10 * 3 * 4 = ?

Answer 7

120

Answer 8

Correct! good job!

Answer 9

a shortcut way of doing these is

10C3 = 10*9*8
------
3*2*1


do you see the pattern?

Answer 10

ohhh yes i do. ok thank ya'll

Answer 11

Felipe can choose 1 snack from a box containing 3 different granola bars, 4 different kinds of fruit, and 2 different kinds of chips.

How many ways can Felipe choose a snack?

A.
9

B.
14

C.
5

D.
24
on this one do I just add up all the snacks to get my answer?

Answer 12

then it would be A?

Answer 13

no you dont add

Answer 14

Oh okay can you explain what to do please

Answer 15

think of a simpler example
you have 2 friuts and 3 toffee bars

for each of the fruits you can pick any one of 3 toffee bars

so how many combinations are there?

Answer 16

2*3=6?

Answer 17

fruits are A and B , Bars are C,D and E
possible combinations are AC , AD , AE and ?

Answer 18

right - you multiply

Answer 19

so extend that to your question..

Answer 20

so the answer for my problem would be D?

Answer 21

24 yes

Answer 22

thank you soo much for explain! :)

Answer 23

What is the value of (8 – 5)!?

A.
40,200

B.
24

C.
5040

D.
6
would this one be D? @welshfella

Answer 24

yes

it = 3! = 3*2*1

Answer 25

okay yay lol im doing better. i think

Answer 26

yes keep it up

Answer 27

How many combinations of 4 students can a teacher choose from 30 students?

A.
810,000

B.
27,405

C.
657,720

D.
120

Answer 28

in this one do i multiply?

Answer 29

rememnber the shortcut ?

5C3 = 5*3*2
-----
3*2*2


then 30C4 = 30*29........
--------
4*3..........

Answer 30

can you fill in the blanks?

Answer 31

* correction that is 3*2*1 ( 2 posts ago)

Answer 32

start from 30 on top of the fraction and multiply by 1 less for a count of 4
then the denominator is 4*3 .... down to 1