The formula for the number of combinations of choosing "r" objects from a larger set of "n" is
combinations = n! / r! * (n - r)!
we know combinations = 35 and r = 3 so we have to solve for "n"
35 = n! / 3! * (n -3)!
n = 7 colors were available
The correct answer among all the other choices is B. (6, 0). This <span>ordered pair in the form (a, b) is a solution of the equation 4a – 5b = 24. I got it by letting 4a = 24 + 5b. Then substitute it to solve. </span>Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
Answer: 500
Step-by-step explanation: use the equation y=mx+b.
B = cost of the plan per month
X = number of minutes
M = price per minute
The first plan is a flat rate of $25 a month. Whereas the second is $10 plus $0.05 a minute.
Plug in the answers until you get a price that is equal to $25.
Y = 0.05(300) + 10
Y = 25
therefore after 300 minutes the other plan is cheaper