Triangles have 3 vertices. The total is 21 vertices. 21 / 3 = 7. He drew 7 triangles.
Gary should be the correct choice because when you balance their checkbook correctly you should have a balanced or equal amount in both your check register and your bank statement.
Good luck! Please let me know if I have chosen the wrong answer. All though I am very confident in my answer.
Answer:
-3a-2b+3ab
Step-by-step explanation:
2a-5a
-4b+2b
Answer:
15n
Step-by-step explanation:
Since it is 15 samples per day, you just need to multiple 15 by the number of days.
[<em>We assume that each piece of apple is identical</em>]
{{{{This part for little more explanation:
There are 12C6 ways that 6 fruits can be taken from the bag
which is equal to
=12!/{(12-6)!*6!}
=(12*11*10*9*8*7*6!) / (6!*6!)
=665280 / (6*5*4*3*2*1)
=924 ways
}}}}}
Your main solution here:
Similarly there are 6C5 ways to get exactly 5 apples out of 6 fruits which is equal to,
=6! / {(6-5)! *5! }
=(6*5!) / (1!*5!)
=6 ways>>>>>>>ANSWER
NOTE: nCx=n! / [(n-x)! *x!] where n=total items and x= no of items choosen
{n is written up in the upper left of C and x is written as Subscript}
