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jeka57 [31]
3 years ago
10

Solve 5 over x plus 8 equals 3 over x for x and determine if the solution is extraneous or not.

Mathematics
1 answer:
Maurinko [17]3 years ago
8 0
\frac{5}{x+8}=\frac{3}{x}\ \ \ Domain\ D:x+8\neq0\to x\neq-8\ and\ x\neq0\\\\cross\ multiply\\\\5(x)=3(x+8)\ \ \ |use\ distributive\ property\ a(b+c)=ab+ac\\\\5x=3(x)+3(8)\\\\5x=3x+24\ \ \ \ |subtract\ 3x\ from\ both\ sides\\\\2x=24\ \ \ \ |divide\ both\ sides\ by\ 2\\\\\huge\boxed{x=12\in D}
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Answer: 3.625 yards above the sea level.


Step-by-step explanation:

Given:  The elevation of top of top of blue mountain above the sea level= 19\frac{3}{4}=19.75\ yards

The length of the lowest point below the sea level= 12.5 yards

The total elevation from the lowest point under the sea and the top  of blue mountain=19.75+12.5=32.25 yards

The midpoint between the top and bottom of the slope = \frac{1}{2}\times32.25=16.125\ yards

Since the ski lift is going to pick them up at the midpoint between top and bottom of the slope.

Therefore, the elevation at which they will be picked up= 19.75-16.125=3.625\ yards above the sea level.

5 0
3 years ago
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Sliva [168]
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3 years ago
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x=25

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