Answer: 70/1001
Step-by-step explanation:
Choosing 4 boys from total of 8 boys is a combination of 8 when 4 is taken at a time:
8C4 = 8!/4!4!
= 70
Since they are all boys, that means we are choosing 0 girl from the 6 girls.
6C0 = 6!/6!0!
= 1
Choosing 4 students from a total of 6+8=14 students is a combination of 14 when 4 people is taken at a time:
14C4 = 14!/10!4!
= 1001
This will give a probability of:
(70 × 1)/1001
= 70/1001
Answer: I think its A If you do the math corrcetly
Step-by-step explanation:
Answer:
the whole sequence is
5, 1 1/2, -2, -5 1/2, -9
the missing elements were
1 1/2, -2, -5 1/2
Step-by-step explanation:
an arithmetic sequence means that there is always constant added or subtracted from the previous term to create the next term.
we know, we need to go 4 steps or terms to get from 5 to -9.
5 + c = ?
5 + c + c = ??
5 + c + c + c = ???
5 + c + c + c + c = -9
5 + 4c = -9
4c = - 14
c = -14/4 = -7/2
so, we get
? = 5 + -7/2 = 10/2 - 7/2 = 3/2 = 1 1/2
?? = 3/2 - 7/2 = -4/2 = -2
??? = -4/2 - 7/2 = -11/2 = -5 1/2
and the next step is -11/2 - 7/2 = -18/2 = -9
correct.
Y² + 12x - 6y + 21 = 0
<u> - 21 - 21</u>
y² + 12x - 6y = -21
12x + y² - 6y = -21
12x + (y² - 6y + 9) = -21 + 9
<u>12x</u> + <u>(y - 3)²</u> = <u>-12</u>
-12 -12 -12
-x + <u>(y - 3)²</u> = 1
-12
$6.75 hope this helps my dude