Hello!
₉P₄ means the number of permutations of 9 objects chosen 4 at a time.
<span>This is 9! / (9-4)! = 362,880 / 120 = 3024.
</span>
nPr = n!/(n-r)!
<span>nCr = n!/(n-r)!r!
</span>
<span>So as said, in this case its 9P4=9!\5!=9*8*7*6=3024
</span>
Hope this Helps! Have A Wonderful Day! :)
Answer:
Second term=9
Third term=14
Twelfth term=59
Eightieth term=399
nth term=-1+5n
Step-by-step explanation:
First term=a=4
Common difference=d=5
using the formula
Tn=a + d x (n-1)
Second term=4 + 5 x (2-1)
Second term=4 + 5 x 1
Second term=4 + 5
Second term=9
3rd term=4+5x(3-1)
3rd term=4+5x2
3rd term=4+10
3rd term=14
12th term=4+5x(12-1)
12th term=4+5x11
12th term=4+55
12th term=59
80th term=4+5x(80-1)
80th term=4+5x79
80th term=4+395
80th term=399
nth term=4+5(n-1)
nth term=4+5n-5
nth term=4-5+5n
nth term=-1+5n
Answer:
C. x-2
Step-by-step explanation:
got it right on edg.
Answer:
219.96 yd²
Step-by-step explanation:
Calculate the area (A) of the trapezoid using the formula
A =
h(a + b)
where a, b are the parallel bases and h is the height
here h = 11.7, a = 21.8 and b = 15.8
A =
× 11.7(21.8 + 15.8)
= 0.5 × 11.7 × 37.6 = 219.96 yd²