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Kazeer [188]
3 years ago
15

For which value of x will the rational expression below be undefined? Check all that apply. (x-5)(x+2)/x+1 A. -5 B. -1 C. 1 D. 5

E. -2 F. 2
Mathematics
2 answers:
REY [17]3 years ago
7 0

Answer:

<h2><u>Answer </u><u>:</u><u>-</u></h2>

\sf \:  \dfrac{(x - 5)(x + 2)}{x + 1}

Now,

Taking denominator as 0

x + 1 = 0

x = 0 - 1

x = -1

Tresset [83]3 years ago
3 0

Answer:

  • B. -1

Step-by-step explanation:

<u>Given expression:</u>

  • (x-5)(x+2)/(x+1)

<u>This is undefined when the denominator is zero:</u>

  • x + 1 = 0
  • x = -1

Correct choice is B

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3 years ago
Maximizing revenue. Edwards University wants to determine what price to charge for tickets to football games. At $18 per ticket,
Papessa [141]

Answer:

New price is $12.75

New attendance is 57500

Step-by-step explanation:

For starters, we use the relation.

18 - 3x

Since we don't know the number of times we're expected to deduct $3 from the price.

Again, we have 40000 + 10000x on another hand. Question says to add 10000 people everytime $3 is deducted.

Since (40000 + 10000x) is the number of people, we multiply it by $4.50, the average amount each person spends is then gotten to be

(18 - 3x) (40000 + 10000x) + (40000 + 10000x) (4.5) = 0

Expanding the bracket, we have

[720000 + 60000x - 30000x²] + [180000 + 45000x] = 0, solving further, we have

900000 + 105000x - 30000x² = 0 or

-30000x² + 105000x + 900000 = 0

Then, we find the maximum of a quadratic, by finding the axis of symmetry. Use x = -b/2a

x = -105000 / 2 * -30000

x = -105000 / -60000

x = 1.75

From our earlier equations, the new price then is

18 - 3(1.75) = 18 - 5.25 = $12.75

The new attendance also is

40000 + 10000(1.75) =

40000 + 17500 = 57500

7 0
2 years ago
Caleb spent 34.95 on 5 pounds of coffee. how much was the coffee per pound?
horsena [70]
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Step-by-step explanation:

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