Mark buys a woden board that is 7 1/2 feet long. the cost of the wooden board is $0.50 per foot, including tax. enter and explain the total cost, in dollars, of the wooden board

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area of rectangle a is 2 times that of rectangle b that means 2x+x =   36cm^2

3x = 36cm ^2

x = 36/3

x= 12cm^2

and 2x = 24cm^2

now side of square = are divided by sides = 36/4 = 6cm

that means length of rectangle a and b is 6cm too

now for rectangle a,

l*b = area

= 6*y=24

y=24/6 = 4

therefore dimensions of rectangle a are- length = 6cm, breadth = 4cm

and for rectangle b, length = 6cm and breadth = 6-4 = 2cm.

hope this .

you would 18 *0.25 = 4.5

answer is  

d.

all of the above

hope you get this right