C
I believe is the right one
Answer:
84
Step-by-step explanation:
Combinations
nCr
n (objects) = 9
r (sample) = 3
9C3
n! / r! (n – r)!
9! / 3! (9 – 3)!=
9! / (3! * 6!)=
9*8*7*6!/ (3! * 6!)=
6! cancels out
9*8*7/3*2*1=
3*4*7=
12*7=
84
First, you must get rid of the fractions. You can do that by multiplying that 15. Then, you get:
45x-12=-5x
Then combine the like terms
50x=12
x=12/50=6/25
Step-by-step explanation:
a 43
hope it helps
your welcome
Answer:
7.3 times 10 to the 8th equals 730000000
2.4 times 10 to the 3rd equals 2400
Step-by-step explanation: