the answer is d. 12 cuz a cube is the same length in each side so the width is 6 and so is the length so 6×6 =36 so that's the area of the square and 6 ×12=72 divided by 2 (since it's a triangle) is 36 so the value of x is 12
So we see the pythagorean theorem
a^2+b^2=c^2
diagonal=c
width=a or b, pick one
width=a
legnth=b
width is 5 times more than 2 times legnth of garden
w=5(2legnth)
this doesn't make sense since the legnth is normally longer than the width, but we'll stick with that
w=5(2l)
w=10l
a=10b
(10b)^2+b^2=90^2
100b^2+b^2=8100
101b^2=8100
divide by 101
b^2=80.198 aprox 80.2
square root
8.95533
legnth of garden =8.96
to find width subsitue
w=10l
w=89.56
legnth=8.96
width=89.56
M=w-30 is the answer if you want to find how much you want to find each week.