The item should cost 43,85 $
What is the solution to this system of linear equations? y − 4x = 7 2y + 4x = 2
1 answer:
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Answer:
x = ± 2
Step-by-step explanation:
Given
16 - 2x² = - 64 ( subtract 16 from both sides )
- 2x² = - 80 ( divide both sides by - 2 )
x² = 40 ( take the square root of both sides )
x = ± = ±
= ± 2