Question

I am a rectangle 2x-y-18,2x+6,3y,x-2y+9
Find the values of x and y.Find my perimeter and area​

Answer 1

Answer:

x = 6         y = -3/2

Perimeter = 45

Area =  81

Step-by-step explanation:

Since it is a rectangle opposites sides are equAL

2x - y -18 = 3y

2x - 4y = 18  (equation 1)

2x + 6 = x - 2y + 9

x + 2y = 3 ( equation 2 )

Now multiply equation 2 with 2 and substract it from equation (1)

- 8y = 18 -6

y = -3/2

by substituting the value of y in equation 2 ,

x + 2 ( -3/2) = 3

x = 6

Length(L) = 2x - y - 18 = 2*6 + 3/2 - 18 = 12 + 1.5 - 18 = - 4.5 = 4.5

breadth (B) = 2x + 6 = 2 *6 + 6 = 18

Perimeter = 2 ( l + b ) = 2 (4.5 + 18) = 45

Area = l * b = 4.5 * 18  = 81

Answer 2

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