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5x-3(2x+7)=2x+9 step:1 5x-6-21=2x+9 step2 -11x -21=2x+9 step 3 -13 x=30 step4 x=-30/13
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Answer:
112 m
Step-by-step explanation:
The area (A) of a square is
A = s² ( s is the length of side )
Here A = 784 , then
s² = 784 ( take the square root of both sides )
s = = 28
Then
perimeter = 4s = 4 × 28 = 112 m