A farmer has 60m of fencing with which to construct three sides of a rectangular yard connected to an existing fence.

a) If the width of the yard is x meters and the area inside the yard is A meters squared, write down the rule connecting A and x.

b) Sketch the graph of A against x.

c) Determine the maximum area that can be formed for the yard.

i dony know

step-by-step explanation:

x/3-10=8

x/3=18

x=48

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

if x = 1, then the answer is 3.5