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Dimas [21]
3 years ago
15

Show that the equation x^3+6x-5=0 has a solution between x=0 and x=1

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
6 0

Answer:

Since the value of f(0) is negative and the value of f(1) is positive, then there is at least one value of x between 0 and 1 for which f(x) =0.

Step-by-step explanation:

The equation f(x) given is:

f(x) = x^3+6x-5

For x = 0. the value of the expression is:

f(0) = 0^3+0-5\\f(0) = -5

For x = 1, the value of the expression is:

f(1) = 1^3+6-5\\f(1)=2

Since the value of f(0) is negative and the value of f(1) is positive, then there is at least one value of x between 0 and 1 for which f(x) =0.

In other words, there is at least one solution for the equation between x=0 and x=1.

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I scream for ice cream sells specialty ice cream in three​ flavors: rocky​ road, peanut​ butter, and fruity tooty. it sold​ 17,0
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---------------------------------------------------------------------
Find Sales Price of 5 gallons of ice-cream:
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Sales price of Fruity Tooty = $6.00
Sales price of Peanut Butter = $5 x 2 = $10.00
Sales price of Rocky Road = $5.25 x 2 = $10.50
Total Sales Per 5 gallon = $6 + $10 + $10.50 = $26.50

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Find Variable Cost of 5 gallons of ice-cream:
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Variable Cost of Fruit Tooty = $5.25
Variable Cost of Peanut Butter = $4.50 x 2 = $9.00
Variable Cost of Rocky Road = $4 x 2 = $8.00
Total Variable Coast = $5.25 + $9 + $8 = $22.25

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Fixed Cost Given:
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Fixed Cost = $7500

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Define x:
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Let x be the number of 5 gallons that need to be sold to breakeven:

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Find x:
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26.50x = 7500 + 22.25x

26.50x - 22.25x = 7500

4.25x = 7500

x = 7500 ÷ 4.25

x = 1764.7 (Nearest tenth)

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Find the number of gallons of ice-cream needed:
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Total number of 5 gallons needed = 1764.7

Total gallons needed = 1764.7 x 5 =8823.5

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Answer: I sceam needs to sell 8823.5 gallons of ice cream to break even.
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