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Olenka [21]
3 years ago
13

Which ratio forms a proportion with 9/15 ? a. 3/6 b. 2/3 c. 12/30 d. 6/10

Mathematics
1 answer:
Veronika [31]3 years ago
4 0
I am pretty sure it is (a) because 9 and 15 and 3 and 6 can be all divided by 3
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If x^2=20 what is the value of x will give brainliest for answer
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Answer:

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x =  \frac{ - 0 ±  \sqrt{ {0}^{2}  - 4(1)( -20)} }{2(1)}  \\  \\ x =  \frac{± \sqrt{80} }{2}  \\  \\ x =  \frac{±4 \sqrt{5} }{2}  \\  \\  \\ x = ±2 \sqrt{5}  \\  \\  \\ x = 2 \sqrt{5}  \:  \:  \: or \:  \:  \: x =  - 2 \sqrt{5}

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3 years ago
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