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SSSSS [86.1K]
3 years ago
10

For all x > 0 and y > 0, the radical expression:

Mathematics
1 answer:
Lelechka [254]3 years ago
8 0
\frac{ \sqrt{x} }{3 \sqrt{x} - \sqrt{y} } = \frac{3x+ \sqrt{xy} }{9x-y} =\frac{3x+ \sqrt{xy} }{(3 \sqrt{x} - \sqrt{y})(3 \sqrt{x} + \sqrt{y})}  \\  \sqrt{x} =\frac{ \sqrt{x} (3 \sqrt{x} + \sqrt{y}) }{(3 \sqrt{x} + \sqrt{y})} \\  \sqrt{x} = \sqrt{x}  \\ 1=1

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Yes 7.5 is clearly the answer here
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3 years ago
A scientist has two solutions, which she has labeled Solutuion A and Solution B. Each contains salt. She knows that Solutuion A
ratelena [41]

a = amount (in oz) of solution A

b = amount of solution B

The scientist wants a mixture of 110 oz, so

a + b = 110

Solution A consists of 65% salt, so each ounce of solution A contributes 0.65 oz of salt; similarly, each ounce of B contributes 0.9 oz. The mixture is supposed to consist of 75% salt, which amounts to 0.75 * (110 oz) = 82.5 oz of salt. So

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3 years ago
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