A. Find the mean, median, and mode of 12, 9, 17, 15, 10.
mean:
median:
6

Mean: 12.6

Mode: 12, 9, 17, 15, 10

Median: 12

mean: 12.6

median: 12

mode: n/a

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