Answer:
55
Step-by-step explanation:
Combinations formula is used to make choice of 'R' out of 'N' options =
N(C)R = N ! / [ R ! . (N-R)! ]
Total choices to choose 4 out of 8 friends = 8C4
= 8! / (4! 4!)
= 70
Choices for calling them 2 together = 2C2 x 6C2
= 1 x [ 6! / (2! 4!)]
= 15
So : Number of choices that the 2 friends are not called together = Total choices - choices they are called together
= 70 - 15 = 55
You are correct because everything is completely factored out
Hello :
<span>7979 °=360°× 22 + 59°
</span><span> the complement of a 7979degrees° is : x
x+</span>59°=180°
x= 180°-59° =121°
2 cm = 8 feet.
4 / 2 = 2. 8 * 2 = 16. 16 feet in width.
Now, the length:
6 / 2 = 3. 8 * 3 = 24. 24 feet in length.
The actual dimensions are 16 feet in width and 24 feet in length.
Answer:
t=5s-3
Step-by-step explanation:
Flip the equation:
5s+t=-3
then add 5s to both sides:
-5s+t+5s=-3+5s
then solve:
5s-3=t
