How many ways are there to select 6 students from a class of 25 to serve on a committee?

25 ways to select the first one, 24 ways to select the second one, ... 20 ways to select the last one. Those same 6 can be selected in 6! different orders, so there are really 25·24·23·22·21·20/6! = 177,100 ways to select the students without regard to order.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

what statement? is there an image?