−10=−b/4
what does b equal?

-10 = -b/4

-10 x 4 = -b

-40 = -b

40 = b

hence, b = 40

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to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

hi! i think the answer is 1/2 : )