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frozen [14]
3 years ago
12

PLZ HELP Simplify the rational expression. State any excluded values. 2x/-5x+x^2

Mathematics
2 answers:
Bas_tet [7]3 years ago
6 0
(2x/-5x)+x^2
(x(2)/(x(-5))+x^2

(-2/5)+x^2, the x values cancel in numerator and denominator and simplify to -2/5
poizon [28]3 years ago
3 0

Answer:

The excluded value is x=5.

Step-by-step explanation:

Given : Expression  \frac{2x}{-5x+x^2}

To find : Simplify the rational expression. State any excluded values.      

Solution :

First we simplify the expression,

\frac{2x}{-5x+x^2}

Taking x common from the denominator,

=\frac{2x}{x(-5+x)}

Cancel the common term from numerator and denominator,

=\frac{2}{-5+x}

To find the excluded value we put the denominator equal to zero to get the value of x in which given expression is not valid.

-5+x=0

x=5

Therefore, The excluded value is x=5.

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Answer:

The chance that there will be exactly 2 heads among the first five tosses and exactly 4 heads among the last 5 tosses is P=0.0488.

Step-by-step explanation:

To solve this problem we divide the tossing in two: the first 5 tosses and the last 5 tosses.

Both heads and tails have an individual probability p=0.5.

Then, both group of five tosses have the same binomial distribution: n=5, p=0.5.

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