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Mumz [18]
3 years ago
7

PLZ HELPP!!!

Mathematics
1 answer:
Arturiano [62]3 years ago
5 0

Answer:

Given that: \frac{x-y}{x+y} - \frac{x+y}{x-y}

Take LCM of x+y and x-y is, x^2-y^2

then;

\frac{(x-y)^2 -(x+y)^2}{x^2-y^2}

Using the identities rule:

(a+b)^2 = a^2+2ab+b^2

\frac{(x^2-2xy+y^2)-(x^2+2xy+y^2)}{x^2-y^2} = \frac{x^2-2xy+y^2-x^2-2xy-y^2}{x^2-y^2}

Combine like terms;

\frac{-4xy}{x^2-y^2}

Therefore, the answer is, \frac{-4xy}{x^2-y^2}

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Mary takes a sightseeing tour on a helicopter that can fly 450 miles against a 35 mph headwind. In the same amount of time it ca
monitta

Answer:

V = 160mph

Step-by-step explanation:

We need to start from the formula of speed: V=d/t

We have two travels, with and against the wind, both done in the same time.

Clearing t from the formula, we will have: t=d/V2

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Now, we find V:

450miles/V-35mph = 702miles/V+35

450*V+35 = 702*V-35

450V+15,750 = 702V-24,570

702V-450V = 15,750 + 24,570

252V = 40,320

V = 40,320/252

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