Calculate the perimeter of a square with side length of 9 cm don not include units in your answer
1 answer:
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Answer:
(,
Step-by-step explanation:
Given the 2 equations
- 2x = 16 - 8y → (1)
x + 4y = 25 → (2)
Rearrange (2) expressing x in terms of y by subtracting 4y from both sides
x = 25 - 4y → (3)
Substitute x = 25 - 4y into (1)
- 2 (25 - 4y) = 16 - 8y ← distribute left side
- 50 + 8y = 16 - 8y ( add 8y to both sides )
- 50 + 16y = 16 ( add 50 to both sides )
16y = 66 ( divide both sides by 16 )
y = =
Substitute this value into (3) for corresponding value of x
x = 25 - 4 × )
= -
=
Solution is ( ,
)
Notice the picture below
now, we know their perimeter are the same for both
thus 4(a+4) = 6a
solve for "a"
now, we know their perimeter are the same for both
thus 4(a+4) = 6a
solve for "a"