5a + 5b + 5c = −20 4a + 3b + 3c = −6 −4a + 3b + 3c = 9
1 answer:
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At least they admitted this is algebra not geometry. You'll get the same question next year but they'll call it geometry.
The area is the product of the sides:
We just distribute and collect terms:
Answer: 3rd choice