Answer:
C) 15
Step-by-step explanation:
Here we have to use the combination to find the number of possible combinations.
Total number of classmates (n) = 6
We are selecting 2 individuals. So r = 2.
The combination formula nCr = ![\frac{n!}{r!(n-r)!}](https://tex.z-dn.net/?f=%5Cfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D)
Plug in n = 6 and r =2, in the above formula, we get
= ![\frac{6!}{2!(6-2)!}](https://tex.z-dn.net/?f=%5Cfrac%7B6%21%7D%7B2%21%286-2%29%21%7D)
= ![\frac{6!}{2!4!}](https://tex.z-dn.net/?f=%5Cfrac%7B6%21%7D%7B2%214%21%7D)
Simplifying the above factorial, we get
= 15
So the answer is C) 15
Answer:
![C)\:-1](https://tex.z-dn.net/?f=C%29%5C%3A-1)
Step-by-step explanation:
![3x-3=9x+3\\\Leftrightarrow 6x=-6\\\Leftrightarrow x=-1](https://tex.z-dn.net/?f=3x-3%3D9x%2B3%5C%5C%5CLeftrightarrow%206x%3D-6%5C%5C%5CLeftrightarrow%20x%3D-1)
We are given dimension of billboard as 30 feet by 18ft.
since billboard is a rectangle so Area =l *b
Area of billboard = 30*18=540 feet square
1 gallon of paint covers 250 square feet
so for 540 square feet paint needed = 540/250 = 2.16 gallons
Answer: 2.16 gallons should be purchased to cover the entire billboard
Answer:
61
Step-by-step explanation:
180-119=61
Answer:disuxysidux
Step-by-step explanation:suussususu