The perimeter of a rectangular field is 340 yards. The length is 90 yd longer than the width. Find the dimensions.

length= 100 width=70

Step-by-step explanation:

The perimeter of a rectangular field is 340 yds.  

The length is 30 yds longer than the width.  

2(l + w) = 340

l + w = 170

w + 30 + w = 170

2w = 140

w = 70

Hence the dimensions:

Length: 100 yds.

Width: 70 yds.

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