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Natali [406]
3 years ago
7

If y varies directly as x and x= 15 when y = 5, find x when y= 9

Mathematics
1 answer:
dalvyx [7]3 years ago
7 0

Answer:

x = 27

Step-by-step explanation:

x = y x 3.

5 = y, x = 15.

5 x 3 = 15.

y = 9.

9 x 3 = 27.

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kati45 [8]

Answer: y ≥ (3/5)*x - 3

Step-by-step explanation:

In the graph, we can see that we are above a bold line, that goes through the points (0, -3) and (5, 0)

First, let's find the equation for this line:

y = a*x + b

the value of a is the slope and is equal to:

a = (0 - (-3))/(5 -0) = 3/5

and the value of b is the point where the line intersects the y-axis, in this case, b = -3

then our line is

y = (3/5)*x - 3

As the shaded part is above the line, this equality represents the minimum value that y can take for a given x, and because the line is not a doted line, we know that the equality is valid, so we must use the ≥ symbol.

y ≥ (3/5)*x - 3

4 0
3 years ago
Another easy one
andreyandreev [35.5K]
The limit is equivalent to the value of the derivative of \cos x at x=\dfrac\pi2. (See definition of derivative)

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4 0
3 years ago
Find -48a divided by 8 when a =1 . Write the answer in simplest form.<br><br> The solution is
love history [14]

Answer: -6

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7 0
2 years ago
Pleaseee help me with this problem
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Answer:

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Step-by-step explanation:

4 0
3 years ago
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Answer:

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Step-by-step explanation:

Hope this helps

3 0
3 years ago
Read 2 more answers
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