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jolli1 [7]
3 years ago
11

3x-7y=6 2x+7y=4 Solve by elimination

Mathematics
2 answers:
artcher [175]3 years ago
7 0
3x-7y=6 \\
\underline{2x+7y=4} \\
3x+2x=6+4 \\
5x=10 \ \ \ |\div 5 \\
x=2 \\ \\
3x-7y=6 \\
3 \times 2-7y=6 \\
6-7y=6 \ \ \ |-6
\\ -7y=0 \ \ \ |\div (-7) \\
y=0 \\ \\
(x,y)=(2,0)
jeka57 [31]3 years ago
7 0
3x-7y=6\\
\underline{2x+7y=4}\\
5x=10\\
x=2\\\\
3\cdot2-7y=6\\
6-7y=6\\
-7y=0\\
y=0

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8 0
2 years ago
The ordered pairs model an exponential growth function. (−1,21.875), (0,35), (1,56), (2,89.6) What is the function equation? f(x
Karolina [17]

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Step-by-step explanation:

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3 years ago
Among all pairs of numbers with a sum of 215, find the pair whose product is maximum. Write your answers as fractions reduced to
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Answer:

Step-by-step explanation:

This is calculus, but I don't get fractions in the end. To maximize or minimize any function, you need to find the derivative of it, set it equal to 0, then solve for the critical values.

Our given equation is

x + y = 215 and we want to maximize the product, xy. Therefore,

y = 215 - x so its product in terms of x is

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The product is 11556.25, not that you need it.

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