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3 years ago

For what value of x is the rational expression below undefined? x+8/x^2 -2x-24

Mathematics

2 answers:

notsponge [240]3 years ago

8 0

Answer:

Step-by-step explanation:

Katena32 [7]3 years ago

3 0

First step: Factor the expression.
(x + 8) / (x - 6)(x + 4)
Set each factor of the denominator equal to zero.
x - 6 = 0 x + 4 = 0
add 6 to both sides subtract 4 from both sides
x = 6 x = -4
The function would be undefined if x = 6 or x = -4

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1.8 in simplest form

andre [41]

1.8 in fraction form (simplest) is 1 4/5 or 9/5

5 0

3 years ago

Read 2 more answers

Whats the answer for this 14=-(p-8)

Paraphin [41]

Answer: " p = - 6 " .

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Step-by-step explanation:

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Given: 14 = - (p - 8) ; Solve for "p" ;

Rewrite as:

↔ - (p - 8) = 14 ;

which is the same as:

-1(p - 8) = 14 ; ;

Divide each side by "-1" ; to get rid of the "-1" ;

{-1(p - 8) } / -1 = {14} / -1 ;

to get:

(p - 8) = -14 ;

Rewrite as:

p - 8 = -14 ;

Now add "8" to each side of the equation;

to isolate "p" on one side of the equation; & to solve for "p" :

p - 8 + 8 = -14 + 8 ;

to get:

p = - 6 ;

which is the answer:

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p = - 6 .

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Now, let us check our answer:

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Given: 14 = - (p - 8) ;

Substitute our solved value: "-6" ; for "p" ; to see if the equation holds true:

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14 = - (p - 8) ;

14 =? -(-6 - 8) ;

14 =? -(-14) ;

14 =? + 14 ? Yes!

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Hope this answer and explanation is helpful to you!

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4 0

3 years ago

Read 2 more answers

Jeff and Kirk can build a 75-ft retaining wall together in 4 hours. Because Jeff has more experience, he could build the wall

oee [108]

It will take Kirk about 8 hours 32 minutes to build the wall by himself.

<h3>What is Quadratic Polynomial?</h3>

Quadratic equations are second-degree algebraic expressions and are of the form ax² + bx + c = 0.

Here, Let k represent Kirk's time (in hours) to build the wall by himself. Then (k-1) is the time it takes for Jeff to build it. Their working-together rate in "walls per hour" is ...

1/k +1/(k -1) = 1/4

Multiplying by 4k(k-1), we have ...

4(k-1) +4k = k(k -1)

k² -9k = -4 . . . . . . . . subtract 8k and simplify

k² -9k +20.25 = 16.25 . . . . . add (9/2)² to complete the square

k -4.5 = √16.25 . . . . . . . . . take the square root

k = 4.5 +√16.25 ≈ 8.531129 . . . hours

The fractional hour is ...

0.531129 × 60 min ≈ 31.9 min ≈ 32 min

Thus, It will take Kirk about 8 hours 32 minutes to build the wall by himself.

Learn more about Quadratic Polynomial from:

brainly.com/question/2350120