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Lynna [10]
3 years ago
12

Solve for y. 6(y+4)=-3(2y-2) +8y Simplify your answer as much as possible. y =

Mathematics
2 answers:
nadezda [96]3 years ago
7 0

Answer:

6(y + 4) = -3(2y - 2) + 8y

6y + 24 = -6y + 6 + 8y

6y + 24 = 2y + 6

Subtract -2y on both sides

4y + 24 = 6

Subtract -24 on both sides

4y = -18

y = - 4.5

Anit [1.1K]3 years ago
7 0

Answer:

-9/2 or -4.5

Step-by-step explanation:

  1. Distribution; 6y+24 = -6y+6+8y
  2. Combine like terms; 6y+24 = 2y+6
  3. Put y on one side; 6y-2y = -24+6
  4. Simplify; 4y = -18
  5. 4y/4 = -18/4
  6. y= -9/2 or -4.5

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9514 1404 393

Answer:

  • x = 8
  • BF = 45

Step-by-step explanation:

Using the given information, we have ...

  BH = 2·HF

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  3x +6 = 4x -2

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The length of the median is ...

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Given: cos θ=-4/5, sin x = -12/13, θ is in the third quadrant, 
USPshnik [31]

By definition of tangent,

tan(2<em>θ</em>) = sin(2<em>θ</em>) / cos(2<em>θ</em>)

Recall the double angle identities:

sin(2<em>θ</em>) = 2 sin(<em>θ</em>) cos(<em>θ</em>)

cos(2<em>θ</em>) = cos²(<em>θ</em>) - sin²(<em>θ</em>) = 2 cos²(<em>θ</em>) - 1

where the latter equality follows from the Pythagorean identity, cos²(<em>θ</em>) + sin²(<em>θ</em>) = 1. From this identity we can solve for the unknown value of sin(<em>θ</em>):

sin(<em>θ</em>) = ± √(1 - cos²(<em>θ</em>))

and the sign of sin(<em>θ</em>) is determined by the quadrant in which the angle terminates.

<em />

We're given that <em>θ</em> belongs to the third quadrant, for which both sin(<em>θ</em>) and cos(<em>θ</em>) are negative. So if cos(<em>θ</em>) = -4/5, we get

sin(<em>θ</em>) = - √(1 - (-4/5)²) = -3/5

Then

tan(2<em>θ</em>) = sin(2<em>θ</em>) / cos(2<em>θ</em>)

tan(2<em>θ</em>) = (2 sin(<em>θ</em>) cos(<em>θ</em>)) / (2 cos²(<em>θ</em>) - 1)

tan(2<em>θ</em>) = (2 (-3/5) (-4/5)) / (2 (-4/5)² - 1)

tan(2<em>θ</em>) = 24/7

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The current price is $1.29
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