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DiKsa [7]
3 years ago
10

Kira, David, and Lamar served a total of 71 orders Monday at the school cafeteria. David served 9 fewer orders than Kira. Lamar

served 2 times as many orders as Kira. How many orders did they each serve?
Mathematics
1 answer:
CaHeK987 [17]3 years ago
3 0

Answer:

lamar served 40

kira served 20

david served

i just spent like 15 minutes trying to figure this out and when i finally got it i was so mad because it was such a simple error i was making

Step-by-step explanation:

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Two\ lines\ are\ perpendicular\ if\ product\ of\ the\ slopes\ is\ equal\ -1.\\\\k:y=\frac{3}{7}x+2\to the\ skolpe\ m_k=\frac{3}{7}\\\\l:y=\frac{7}{3}x-\frac{14}{3}\to the\ slope\ m_l=\frac{7}{3}\\\\m_k\times m_l=\frac{3}{7}\times\frac{7}{3}=1\neq-1\\\\conclusion:the\ lines\ are\ not\ perpendicular\\\\Two\ lines\ are\ parallel\ if\ the\ slopes\ are\ equal.\\\\m_k=\frac{3}{7};\ m_l=\frac{7}{3}\to m_k\neq m_l\\\\conclusion:the\ lines\ are\ not\ parallel


Answer:\boxed{C-The\ lines\ intersect\ but\ are\ not\ perpendicular.}
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A third line could be thought to be a diagonal between opposite vertices, but notice that the stars projection won't by symmetric in this case.

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