An online store is offering a special discount promotion. A merchandise order totaling less than $50 will receive a 15% discount, and an order totaling $50 or more will receive a 25% discount

update

Step-by-step explanation:

I think you did not finish your question because I don't know the real question    please update your question and then ill update my answer.

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