Four out of 9 performers will be chosen to stand in a row on stage. how many ways can the 4 performers stand in a row

The order matters.

objects can be chosen out of objects, when the order matters, in ways.

So, the answer is ways.

do you have the measurements?

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk