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Alekssandra [29.7K]
4 years ago
9

—7y - 17 = -38 show your work​

Mathematics
2 answers:
aleksandrvk [35]4 years ago
7 0

Answer:

y = 3

Step-by-step explanation:

Given

- 7y - 17 = - 38 ( add 17 to both sides )

- 7y = - 21 ( divide both sides by - 7 )

y = 3

vova2212 [387]4 years ago
4 0

Answer:

y=3

Step-by-step explanation:

-7y - 17 = -38

Add 17 both sides

-7y - 17 + 17= -38+17

7y= -21

Divide both sides by -7

\dfrac{-7y}{-7}=\dfrac{-21}{-7}

y=3

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Answer:

<u></u>

  • <u>53 seconds.</u>

Explanation:

The text and the model are garbled.

This is the question amended:

<em />

<em>Hyun Woo is riding a ferris wheel. H(t) models his height (in m) above the ground, t seconds after the ride starts. Here, t is entered in radians.</em>

<em>H(t) = -10 cos(2π/150 t)+10</em>

<em />

<em>When does Hyun Woo first reach a height of 16 m?</em>

<em />

<h2>Solution</h2>

<em />

When <em>Hyun Woo reaches a height of 16 m</em> the <em>model </em>states:

  • <em>16 = -10 cos(2π/150 t)+10</em>

<em />

Then you must find the lowest positive value of t that is a solution of the equation.

Solve the equation:

  • <em>16 = -10 cos(2π/150 t)+10</em>

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  • cos(2π/150t) = -0.6

  • 2π/150t = arccos(-0.6)

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