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77julia77 [94]
2 years ago
15

What are the solutions for the following system of equations?

Mathematics
1 answer:
mario62 [17]2 years ago
8 0

We will use graphical way to solve these

  • 3x²+4y-21=0
  • 4x²+y=10

Graph both

The solutions are

  • (±1.209,4.154)

None of the above

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CALC BC HELPPP!!!??? 100PTS!!!
lyudmila [28]

the assumption being that "x" is a plain variable whilst "y" is a function, that matters because the chain rule would be needed for a function, not so for a plain variable.

4x^2+4x+xy=5\implies 8x+4+\stackrel{\textit{product rule}}{\left( 1\cdot y+x\cdot \cfrac{dy}{dx} \right)}=0 \\\\\\ x\cfrac{dy}{dx}=-8x-4-y\implies \cfrac{dy}{dx}=\cfrac{-8x-4-y}{x}

now, we know that y(5) = -23, which is another way of saying that when x = 5, y = -23, but we already knew that, we can get that by simply plugging it into the equation hmmm y'(5), well

\left. \cfrac{dy}{dx}=\cfrac{-8x-4-y}{x} \right|_{\stackrel{x=5~}{\textit{\tiny y=-23}}}\implies \cfrac{-8(5)-4-(-23)}{5}\implies \cfrac{-21}{5}

8 0
2 years ago
you need 1661.06 ft2 of carpet to completely cover the floor or a round room. what is the diameter of the room.
k0ka [10]

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Step-by-step explanation:

6 0
2 years ago
The Art club had an election to select a president. 40% of the 80 members of the club voted in the election. How many members di
Ghella [55]

Answer:

48 member did not vote

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
Food costs are expected to rise 6% each month for the next year. Which series correctly depicts the cost (to the nearest cent) f
alexira [117]
For this case we have the following equation:
 y = 150 * (1.06) ^ t
 For the first month we have:
 y = 150 * (1.06) ^ 1
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 For the second month we have:
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 For the third month we have:
 y = 150 * (1.06) ^ 1
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 Answer:
 
d. $ 159.00 + $ 168.54 + $ 178.65
4 0
3 years ago
Read 2 more answers
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