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Anna007 [38]
3 years ago
12

If 3x−y=12, what is the value of 8x 2y ?

Mathematics
1 answer:
anygoal [31]3 years ago
3 0

If 3x-y=12, what is the value of 8x/2y?

Answer:

\frac{8x}{2y} =\frac{4x}{3x-12}

Step-by-step explanation:

3x-y=12

-y=12-3x

y=3x-12-------------------------(equation 1)

Now,

\frac{8x}{2y} =\frac{8x}{2(3x-12)}---------(from equation 1)

=\frac{8x}{6x-24}

=\frac{8x}{2(3x-12)}

=\frac{4x}{3x-12}

Therefore, the value of \frac{8x}{2y} =\frac{4x}{3x-12}

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Pleaseeeeeeeeeee help.
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Answer:

The total distance Remy will swim is approximately 236 meters

Step-by-step explanation:

From the given diagram, of triangle ΔCAB, we have that the path Remy is to swim are;

1) Length of segment C to A

2) Length of segment A to B

3) Length of segment B to C

The length of the perpendicular at point D on segment AB to C = 60 meters

Therefore, DC = 60 m

By trigonometric ratios, we have;

tan (\theta) = \dfrac{Opposite \ leg \ length}{Adjacent \ leg \ length}

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We are given the values of the trigonometric ratios of the following angles;

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tan(43°) = 0.93

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Where the lengths of AC, AD, DB, DC and BC

AD = DC × tan(43°)

∴ AD = 60 × 0.93 ≈ 55.8

Similarly, we have;

tan(27°) = DB/DC

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DB = 60 × 0.51 ≈ 30.6

From cos(\theta) = \dfrac{Adjacent\ leg \ length}{Hypotenuse \ length}, we have;

cos(43°) = DC/AC

AC = DC/(cos(43°))

∴ AC = 60/0.73 ≈ 82.2

Similarly, we have;

cos(27°) = DC/BC

BC = DC/(cos(27°))

∴ BC = 60/0.89 ≈ 67.4

The total distance Remy will swim = AC + AD + DB + BC

∴ The total distance Remy will swim = 82.2 + 55.8 + 30.6 + 67.4 = 236

The total distance Remy will swim = 236 meters

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