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maksim [4K]
2 years ago
14

Can somebody help me with this?

Mathematics
2 answers:
SCORPION-xisa [38]2 years ago
6 0

Answer:

C

Step-by-step explanation:

<1+<2=180 (angle addition postulate)

<1=39 (given)

39+<2=180 (substitution property)

<2=180-39 (subtraction property)

<2=141 ( simplification)

C, or 141 degrees. Have a nice day!

lesya [120]2 years ago
4 0

Answer:

141 °

since they are supplementary angles and they always add to 180 °

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Answer:

42/81 or 0.5185185

Step-by-step explanation:

7/9 × 2/3

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7/9 × 2/3

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3 years ago
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The shortest length of the fence used by the rancher in a rectangular field of 1000000 square feet is 4899 ft.

<h3>What is the area of a rectangle?</h3>

The area of a rectangle is a region enclosed in four corners where two opposite sides are equal. The area of the rectangle is mathematically expressed as:

Area of a rectangle = length(x) × breath(y)

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However, to determine the fencing, we have:

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Suppose we use the x-direction to estimate the region where the fencing is located, we have:

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From equation (1), make (y) the subject of the formula and replace the value of y with equation (2)

The Length of fencing is:

\mathbf{L = 3x - 2( \dfrac{1000000}{x})}

\mathbf{\dfrac{dL}{dx} = 3 - \dfrac{2000000}{x^2} = 0}

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\mathbf{ x= \dfrac{1000\sqrt{2}}{\sqrt{3}} }

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\mathbf{y = \dfrac{1000000}{\dfrac{1000 \sqrt{6}}{3}} }\\ \\  \\ \\ \mathbf{y = \dfrac{3000 }{\sqrt{6}}}

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Now, the shortest length of the fencing can be computed by using the equation (2):

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\mathbf{L = 3( \dfrac{1000  \sqrt{6}}{3}) + 2(500 \sqrt{6})}

\mathbf{L =1000  \sqrt{6} + 1000 \sqrt{6}}

\mathbf{L =2000  \sqrt{6} }

\mathbf{L \simeq 4899 \ ft}

Learn more about the area of a rectangle here:

brainly.com/question/25292087

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