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nydimaria [60]
3 years ago
6

Y varies directly affects if y equals negative five when x equals 15 find X when y equals three

Mathematics
1 answer:
Anni [7]3 years ago
6 0
Well,

We are given a direct proportion problem.

x varies directly as y.

\frac{x}{y}

When y = -5, x = 15.
\frac{15}{-5} \ or\  \frac{3}{-1}

Now, we are told to find x when y = 3.

\frac{x}{3}

We just have to recognize that the complete case is equal to the incomplete case.  In other words, we set the -3 equal to the x/3.

\frac{3}{-1} =  \frac{x}{3}

Multiply both sides by the LCM.
LCM of -1 and 3 = 3

-9 = x

When y = 3, x = -9.
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You are designing a rectangular poster to contain 7575 in2 of printing with a 33​-in margin at the top and bottom and a 11​-in m
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The dimensions of the rectangular poster is 15 in by 5 in.

Step-by-step explanation:

Given that, the area of the rectangular poster is 75 in².

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1 in margin at each sides and 3 in margin at top and bottom.

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The width of printing space is = (y-2.1) in

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The area of the printing space is A =(x-6)(y-2) in²

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A '= \frac{450}{x^2}-2

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Since at x=15 , A"<0 Therefore at x=15 , the area will be minimize.

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Putting the value of x

y=\frac{75}{15}

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