Classify the following as an element, a compound, or a mixture: sucrose
A. Element
B. Compound
C. Mixture

Sucrose is B. Compound.

Expert answered|yeswey|Points 1260|

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Asked 1/4/2013 7:59:10 PM

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Solve the following quadratic equation by completing the square: x2 + 5x - 3 = 0
A. (-5+v37)/2, (-5 -v37)/2
B. (5+v37)/2, (5 -v37)/2
C. (-5+v13)/2, (-5 -v13)/2
D. No real solution

Weegy: x^(2)+5x-3=0
Since -3 does not contain the variable to solve for, move it to the right-hand side of the equation by adding 3 to both sides.
x^(2)+5x=3
To create a trinomial square on the left-hand side of the equation, [ add a value to both sides of the equation that is equal to the square of half the coefficient of x. In this problem, add ((5)/(2))^(2) to both sides of the equation.
x^(2)+5x+(25)/(4)=3+(25)/(4)
To add fractions, the denominators must be equal. The denominators can be made equal by finding the least common denominator (LCD). In this case, the LCD is 4. Next, multiply each fraction by a factor of 1 that will create the LCD in each of the fractions.
x^(2)+5x+(25)/(4)=3*(4)/(4)+(25)/(4)
Complete the multiplication to produce a denominator of 4 in each expression.
x^(2)+5x+(25)/(4)=(12)/(4)+(25)/(4)
Combine the numerators of all fractions that have common denominators.
x^(2)+5x+(25)/(4)=(12+25)/(4)
Add 25 to 12 to get 37.
x^(2)+5x+(25)/(4)=(37)/(4)
Factor the perfect trinomial square into (x+(5)/(2))^(2).
(x+(5)/(2))^(2)=(37)/(4)
Take the square root of each side of the equation to setup the solution for x.
~((x+(5)/(2))^(2))=\~((37)/(4))
Remove the perfect root factor (x+(5)/(2)) under the radical to solve for x.
(x+(5)/(2))=\~((37)/(4))
Split the fraction inside the radical into a separate radical expression in the numerator and the denominator. A fraction of roots is equivalent to a root of the fraction.
(x+(5)/(2))=\(~(37))/(~(4))
Pull all perfect square roots out from under the radical. ] (More)

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Asked 1/3/2013 12:14:44 PM

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The accused witches were not burned alive, but they were instead hanged.
A. Complex sentence
B. Compound sentence
C. Compound-complex sentence
D. Simple sentence

Weegy: This is a complex sentence. (More)

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Asked 1/3/2013 1:11:35 PM

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After you create a draft of your essay, what should you do?
A. Continue writing until you reached your page limit
B. Rewrite the draft then compare it to the original draft
C. Review it right away for errors
D. Step away from the draft for a bit before reviewing it

Weegy: After a draft C. Review it right away fro errors (More)

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Asked 1/3/2013 1:53:25 PM

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Which of the following are context clues skills?
A. A reader uses connections between difficult words and other words within a sentence
B. By making connections between your knowledge of history events and years and the text
C. Connections between similar words
D. Determining A, B, and C are correct

Weegy: Which of the following are context clues skills?D. Determining A, B, and C are correct (More)

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Asked 1/3/2013 2:24:22 PM

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In the excerpt from Common Sense, what does Thomas Paine say is the plan of the Colonies in relation to the rest of the world?
A. Self-rule.
B. Democratic government.
C. Commerce.
D. Republican government.

Weegy: In the excerpt from Common Sense, what does Thomas Paine say is the plan of the Colonies in relation to the rest of the world? a. self-rule (More)

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Asked 1/3/2013 2:52:00 PM

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