B. Y= x+ 48 trust me bro.
Try this solution, it consists of two parts (MN=8).
You have to get from $30 to $21.75
21.75/30=0.725 x 100= 72.5% of the original price
Area = length *width
102 = 17*w
w = 102/17 = 6
l=17
w=6
perimeter = 2l +2w
p = 2(l+w)
p=2*23
p = 46 cm
hope helped