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3 years ago

For what value of x is the rational expression below undefined?

Mathematics

2 answers:

Cerrena [4.2K]3 years ago

5 0

The answer is a.Good luck

Alla [95]3 years ago

5 0

Answer: The correct option is (A) 6.

Step-by-step explanation: We are given to select the value of x for which the following rational expression become undefined :

$E=\dfrac{3x-5}{x-6}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

We know that

a rational expression become undefined when the denominator is equal to zero.

Therefore, the rational expression (i) will become undefined when

$x-6=0\\\\\Rightarrow x=6.$

Thus, the required value of x for which the given rational expression become undefined is 6.

Option (A) is CORRECT.

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dybincka [34]

Answer:

The angle of elevation of the sun is $36\degree$ .

Step-by-step explanation:

Let $x$ be the angle of elevation of the sun as shown in the diagram.

Then the side length which is $38$ feet is opposite to $x$ and the side length which is $53$ feet is adjacent to $x$ .

Therefore we use the trigonometric ratio that involves the opposite and adjacent sides, which is the tangent ratio.

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We solve for $x$ to get,

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3 years ago

A department store has a discount on shoes based on a percentage of the price. Suppose one pair of shoes is marked down from 80

AysviL [449]

Answer:

Discounted price = $160

Step-by-step explanation:

Let x be the discounted price of shoes.

Given:

A department store has a discount on shoes based on a percentage of the price.

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So, the discounted rate = 80 - 64 = 16

therefore, the percent of discount is.

% value $=\frac{discounted\ rate}{original\ rate}\times 100$

% value $=\frac{16}{80}\times 100$

% value $=\frac{16\times 100}{80}$

% value $=\frac{16\times 10}{8}$

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% value = 20%

Find the price for a $200 pair of shoes after the same discount is applied.

So the discount is 20% and the discounted price of the shoe is 80% of $200.

% value $=\frac{discounted\ price}{original\ price}\times 100$

80 $=\frac{x}{200}\times 100$

$x=\frac{80\times 200}{100}$

$x=80\times 2$

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4 years ago

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Answer:

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