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aniked [119]
3 years ago
11

Which equation represents a proportional relationship that has a constant of proportionality equal to 4/5?

Mathematics
1 answer:
viva [34]3 years ago
8 0

Answer:

the answer is B

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Find the area of a square with a side of length 2 Square root of 3+6 square root of 7 inches
kodGreya [7K]

Answer:

<h3><em>(264+24√21) in²</em></h3>

Step-by-step explanation:

Area of a square = Length * Length

A = L²

Given the length of a square as 2\sqrt{3}+6\sqrt{7} inches' The area of the square will be calculated as shown;

A = (2\sqrt{3}+6\sqrt{7})^2\\\\A = (2\sqrt{3}+6\sqrt{7})(2\sqrt{3}+6\sqrt{7})\\\\A =(2\sqrt{3})(2\sqrt{3})+(2\sqrt{3})(6\sqrt{7})+(6\sqrt{7})(2\sqrt{3})+(6\sqrt{7})(6\sqrt{7})\\\\A = 4\sqrt{9}+12\sqrt{21}+12\sqrt{21}+36\sqrt{49}\\\\A = 4(3)+24\sqrt{21}+36(7)\\ \\A = 12+24\sqrt{21}+252\\\\A = 264+24\sqrt{21}

<em>Hence the area of the square is (264+24√21) in²</em>

8 0
3 years ago
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