Ok... after much confusion, I've come to the conclusion that you must have written the question wrong and it's actually the perimeter that is 90 feet so that's how I'm going to work it...
Width = w
Length = 4w - 9
P = 2w x 2L
90 = 2w + 2(4w - 9)
90 = 2w + 8w - 18
90 = 10w - 18
108 = 10w
108/10 = w
10 4/5 = w
Width is 10 4/5 ft
Length = 4w - 9
L = 4(10 4/5) - 9
L = 43 1/5 - 9
L = 34 1/5 ft
Length 34 1/5 ft Width 10 4/5 ft or
Length 34.2 ft and width 10.8 ft
Area of the whole rectangle with dimensions 4 by 4 = 16cm²
Area of the missing 4 corner squares = 4 ( 1 x 1) = 4 cm²
Area of the figure = 16 - 4 = 12 cm²
Answer: 12 cm²
13000.8 when you multiply, remember to put the decimal in the correct place
Answer: $73
Step-by-step explanation: 36 + 40 maybe
Plug in -3n as n into the functon K(n)=4n+5
so you get
K(-3n)=4(-3n)+5
K(-3n)=-12n+5
